Instruction/ maintenance manual of the product ADAT-HD24 Alesis
Go to page of 102
.
Contents Welcome! .......................................................... 3 About the ADAT HD24 ...................................... 3 Important features of your ADAT HD24 .... 3 ADAT HD24 key features: .................................. 5 How to Use This Manual .
2 ADAT HD24 Reference Manual High resolution operation ...................................... 6 5 88.2/96 kHz sampling rates .............................. 6 5 The tradeoffs .......................................... 6 5 Ensuring sample-rate compatibility .
Introduction/Safety Instructions ADAT HD24 Reference Manual 3 Welcome! Thank you for making the Alesis ADAT HD24™ a part of your studio. Since 1984, we've been designing and building creative tools for the audio community. We believe in our products, because we've heard the results that creative people like you have achieved with them.
Introduction/Safety Instructions 4 ADAT HD24 Reference Manual ¾ Everything you need is built-in: The HD24 comes complete with 24 channels of analog and digital inputs and outputs—there are no cards or extras to buy to get audio in or out of the recorder.
Introduction/Safety Instructions ADAT HD24 Reference Manual 5 ADAT HD24 key features: 1. 24 Track simultaneous recording at 44.1/48 kHz (12 tracks @ 88.2/96 kHz) 2. Storage media: Standard IDE hard drive (minimum 5,400 RPM) 3. Recording time per each 10 gigabytes @ 48kHz: 45 minutes x 24 tracks; @ 96kHz: 45 minutes x 12 tracks 4.
Introduction/Safety Instructions 6 ADAT HD24 Reference Manual How to Use This Manual This manual is divided into the following sections describing the various functions and applications for the ADAT HD24.
ADAT HD24 Reference Manual 7 Important Safety Instructions Safety symbols used in this product This symbol alerts the user that there are important operating and maintenance instructions in the literature accompanying this unit. This symbol warns the user of uninsulated voltage within the unit that can cause dangerous electric shocks.
Introduction/Safety Instructions 8 ADAT HD24 Reference Manual Instructions de Sécurité Importantes (French) Symboles utilisés dans ce produit Ce s ymbole alèrte l’utilisateur qu’il existe des instructions de fonctionnement et de maintenance dans la documentation jointe avec ce produit.
Introduction/Safety Instructions ADAT HD24 Reference Manual 9 Beim Benutzen dieses Produktes beachten Sie bitte die folgenden Sicherheitshinweise: (German) 1. Lesen Sie die Hinweise. 2. Halten Sie sich an die Anleitung. 3. Beachten Sie alle Warnungen.
Introduction/Safety Instructions 10 ADAT HD24 Reference Manual CE Declaration of Conformity Manufacturer’s Name: Alesis Corporation Manufacturer’s Address: 12509 Beatrice Street Los Angeles, CA 90.
chapter 1 ADAT HD24 Reference Manual 11 Quick Start Guide If you can't wait to get started: If you're experienced with multitrack recording, this chapter is a "shorthand" guide for those who want to start using the HD24 right away.
quick start guide • chapter 1 12 ADAT HD24 Reference Manual Step 2: Get the drive ready Mount and select the hard drive When you first turn on the power, the HD24 will automatically mount the last drive that was selected in the system. (Mounting means that the system recognizes the disk, has powered it up, and can communicate with it.
chapter 1 • quick start guide ADAT HD24 Reference Manual 13 Step 3: Try a test recording Now we’re ready to try some basic recording. In this exercise, we’ll simply record some audio into a new song, then play it back to hear the results. 1. First, press the NEW SONG button on the top right corner of the unit.
quick start guide • chapter 1 14 ADAT HD24 Reference Manual Front panel tour—left side Meters Each track has its own 10-segment, peak-reading meter. When it turns yellow, you have 6 dB or less of headroom left. At the top, the red CLIP warns you of the onset of clipping.
chapter 1 • quick start guide ADAT HD24 Reference Manual 15 Front panel tour—right side Editing buttons The EDIT START and EDIT END buttons define a region of a track (or tracks, as determined by the TRACK EDIT button) that can be selected for editing.
quick start guide • chapter 1 16 ADAT HD24 Reference Manual About the Display Time counter shows the current location (from the Song Start point, zero in ABS time) in hours, minutes, seconds, and frames. A uto Icons light whenever the A UTO RECORD, AUTO PLAY, AUTO RETURN, or REHEARSE functions are engaged.
chapter 1 • quick start guide ADAT HD24 Reference Manual 17 Rear panel tour AC connector This is where a standard IEC detachable power cord plugs in. POWER switch (hard) Normally, you'll leave this switch on, controlling power from the front panel switch.
quick start guide • chapter 1 18 ADAT HD24 Reference Manual.
chapter 2 ADAT HD24 Reference Manual 19 Connections Unpacking and Inspection Your ADAT HD24 was packed carefully at the factory. The shipping carton was designed to protect the unit during shipping. Please retain this container in the highly unlikely event that you need to return the HD24 for servicing.
connections • chapter 2 20 ADAT HD24 Reference Manual Power Make sure you read the initial Important Safety Instructions chapter at the front of this manual.
chapter 2 • connections ADAT HD24 Reference Manual 21 Analog inputs and outputs ✪ When connecting audio cables and/or turning power on and off, make sure that all devices in your system are turned off and the volume controls are turned down.
connections • chapter 2 22 ADAT HD24 Reference Manual From the console to the HD24's inputs: What's INPUT NORMALLING? Most affordable analog consoles don't have 24 outputs. Even those with 24 or 32 tape inputs usually have only eight busses or group outputs.
chapter 2 • connections ADAT HD24 Reference Manual 23 About Audio Cables The connections between the ADAT HD24 and your studio are your music’s lifeline, so use only high quality cables. These should be low-capacitance shielded cables with a stranded (not solid) internal conductor and a low-resistance shield.
connections • chapter 2 24 ADAT HD24 Reference Manual Even a 4-bus mixer could be used to record these 14 tracks. Sync In/Out The two DB 9 connectors on the back panel marked SYNC IN and SYNC OUT ar.
chapter 2 • connections ADAT HD24 Reference Manual 25 ADAT Optical Digital Inputs and Outputs Each of the digital inputs and outputs of the ADAT HD24 carries eight tracks or channels (up to 48 kHz) on a single fiber optic cable in the industry-standard ADAT Optical format.
connections • chapter 2 26 ADAT HD24 Reference Manual To connect the digital inputs and outputs 1 . Locate the DIGITAL IN and DIGITAL OUT connectors for Tracks 1-8. Remove the connectors’ plugs (if present) and store for later use. 2. Remove the clear, plastic tube covering each end of the optical cable (if present).
chapter 2 • connections ADAT HD24 Reference Manual 27 Copying between ADATs If you combine an ADAT HD24 with several ADATs in a system and aren't using a digital mixer, you may connect them directly so you can copy the HD24 to tape and the tapes to the HD24.
connections • chapter 2 28 ADAT HD24 Reference Manual Connecting to a computer interface card This illustration shows an HD24 connected to an ADAT-compatible computer interface card. The card’s ADAT outputs are connected to the HD24 Digital Inputs and the HD24’s Digital Outputs are connected to the card’s ADAT Inputs.
chapter 2 • connections ADAT HD24 Reference Manual 29 Footswitches The HD24 provides two footswitch connectors on its rear panel using 1/4" mono (T/S) jacks.
connections • chapter 2 30 ADAT HD24 Reference Manual.
chapter 3 ADAT HD24 Reference Manual 31 Basic Recording and Playback About the hard drives There are no "internal" hard drives in the ADAT- HD24; the drive bays on the front panel house drives up to 2000 GB each which can be removed and/or replaced while the machine is powered up, as long as the LED indicator for the drive is OFF .
basic recording and playback • chapter 3 32 ADAT HD24 Reference Manual To select a Song: 1. On power-up, the ADAT HD24 will mount a drive and automatically select the last song you were using. If the display looks something like this: S0 1 :"Song Name " 00:00:00:00 24t it is already in Song Select mode.
chapter 3 • basic recording and playback ADAT HD24 Reference Manual 33 To name a Song: With up to 64 possible Songs on a drive, it's a good idea to give each one a unique name that will help you find the tracks you need. Names may be up to 10 characters long.
basic recording and playback • chapter 3 34 ADAT HD24 Reference Manual Making A Recording Recording on the HD24 is similar to recording on a multitrack tape machine, if you think of each Song being like its own small tape.
chapter 3 • basic recording and playback ADAT HD24 Reference Manual 35 Transport Buttons During recording and playback, the following transport buttons are used frequently.
basic recording and playback • chapter 3 36 ADAT HD24 Reference Manual Track Selection and Setting Levels You’ll find the RECORD ENABLE buttons ([1]–[24]) for all twenty-four tracks on the left side of the front panel, beneath the display.
chapter 3 • basic recording and playback ADAT HD24 Reference Manual 37 The meters Each of the tracks has its own 10-segment LCD meter, with levels ranging from CLIP (0 dBFS) to –60 dB. Levels within 6 dB (1 bit) of clipping are shown in yellow. The standard nominal level for ADAT, -15 dBFS, is two segments below that color change.
basic recording and playback • chapter 3 38 ADAT HD24 Reference Manual To change the peak hold mode: The PEAK MODE button is designed to allow the user to change the way that signal peaks are displayed in the Level Meter Display.
chapter 3 • basic recording and playback ADAT HD24 Reference Manual 39 Input Select A single INPUT SELECT button (just below the display) selects what source will be recorded: the ANALOG or DIGITAL input. The currently selected input source is indicated in the lower left corner of the display.
basic recording and playback • chapter 3 40 ADAT HD24 Reference Manual Input Monitor Controls There are two Input Monitor controls: AUTO INPUT and ALL INPUT . Auto Input This feature determines what you will hear from the HD24’s output jacks when a track is record- enabled ( REC LED flashing): the track, or the input source.
chapter 3 • basic recording and playback ADAT HD24 Reference Manual 41 Playback There are several ways to quickly play back your recording. You’ll use the transport buttons first. To play back a recording: Press REW to locate back to the position you’re looking for, or use one of the Locate keys to go to a particular position.
basic recording and playback • chapter 3 42 ADAT HD24 Reference Manual Pitch Control The Pitch function controls the recording speed, and thus the pitch of the audio recorded on disk, whenever the CLOCK SOURCE is set to Internal.
chapter 4 ADAT HD24 Reference Manual 43 Using Locate Points Locating Up to 24 time positions can be stored in each Song for easy recall. These are called Locate Points , and can be stored either “on the fly” while the transport is engaged, or when the transport is stopped.
using locate points • chapter 4 44 ADAT HD24 Reference Manual To store locate points “on the fly”: 1. Press PLAY to begin playback. 2. Tap SET LOCATE . The current time position is transferred into the next Locate Point, shown in the lower right hand side of the display, i.
chapter 4 • using locate points ADAT HD24 Reference Manual 45 Other Locate Commands Note that several other functions can be affected when you edit Locate Points: Auto Return When this function is on, the HD24 will automatically jump to the Loop Start point whenever the Loop End point is reached.
using locate points • chapter 4 46 ADAT HD24 Reference Manual To loop a section of a Song: The following instructions assume you’ll use the default settings for Loop Start and Loop End. 1. Store the position where you want t he loop to begin into Locate 1.
chapter 4 • using locate points ADAT HD24 Reference Manual 47 Automated Recording So far, all of your recording has been done manually — you pressed the transport buttons when you wanted to start and stop recording. Auto recording stops and starts recording automatically at predetermined times.
using locate points • chapter 4 48 ADAT HD24 Reference Manual ✪ If none of the tracks are in record-ready (all [ REC ] LEDs off) when Play and Record are pressed, the display will read No Tracks Armed. ✪ If a record is initiated past Locate 21’s position, but before Locate 22’s position, then record is entered immediately.
chapter 5 ADAT HD24 Reference Manual 49 Working with Drives Mounting and selecting a drive One of the key strengths of the ADAT HD24 is its easily-removable hard drives; in fact it was our goal to make the drive caddies similar to ADAT tapes in their transportability and low cost.
working with drives • chapter 5 50 ADAT HD24 Reference Manual How Drives Get Mounted When power is turned on and a drive is present, it will be mounted automatically; you don't need to take any action unless a drive was deliberately dismounted.
chapter 5 • working with drives ADAT HD24 Reference Manual 51 To manually select a drive: Pushing the DRIVE button of a drive whose LED is off will attempt to mount and select that drive.
working with drives • chapter 5 52 ADAT HD24 Reference Manual 4. Press the > (CURSOR RIGHT) button to place the cursor under “Y/N” in the display.
chapter 5 • working with drives ADAT HD24 Reference Manual 53 To get information about the hard drive: If you need information about a hard disk in a drive bay (usually to check for compatibility if there are some problems), use Utility 4 .
working with drives • chapter 5 54 ADAT HD24 Reference Manual Backing up your work Because the ADAT HD24 has two removable drive bays, you can make a safety copy of your valuable recordings right in the unit, as long as you have two drives.
chapter 6 ADAT HD24 Reference Manual 55 Editing One of the key benefits of recording to a hard disk recorder such as the HD24 is the ability to edit your performance. The HD24 allows you to copy a perfect rhythm guitar part to every chorus, move a bass solo to a later chorus, even undo a bad edit.
editing • chapter 6 56 ADAT HD24 Reference Manual Using the Edit Start and Edit End Points Setting accurate EDIT START and EDIT END points will be critical to every edit you make on the HD24. This section will explain how to make the most of these functions.
chapter 6 • editing ADAT HD24 Reference Manual 57 Adjusting the Edit Start and Edit End Points Edit Start and Edit End points can be adjusted in two ways: by using the cursor keys or by using the scrub feature.
editing • chapter 6 58 ADAT HD24 Reference Manual Using the Cut and Copy Commands The Cut and Copy commands place the audio between the Edit Start and Edit End points from edit-selected tracks into a buffer. This audio can then be pasted elsewhere in the song.
chapter 6 • editing ADAT HD24 Reference Manual 59 Cutting entire tracks Instead of cutting between the Edit Start and Edit End points, it is possible to cut the entire track or tracks selected for editing. 1. Press and hold the TRACK EDIT button, then press the Track Record Enable button of the tracks you want to cut.
editing • chapter 6 60 ADAT HD24 Reference Manual Using the Paste Command The Paste function is used in conjunction with the Cut and Copy functions. This function allows you to use the audio that you’ve cut or copied in another section of the song, another track, or even another song.
chapter 6 • editing ADAT HD24 Reference Manual 61 Pasting Audio to a Different Song You can use the PASTE command to move audio to a different song. This is often used to copy tracks from an 8-track song into a 24-track song for more available tracks.
editing • chapter 6 62 ADAT HD24 Reference Manual Undo The undo command reverses the effects of previous edit commands. Multiple levels of undo are available (with certain restrictions on size). For example, if you don’t like the results of a PASTE command, you can press UNDO to return the recording to its pre-paste state.
chapter 6 • editing ADAT HD24 Reference Manual 63 Using the Undo command First, perform a Copy, Cut or Paste command. Press the UNDO button. If your last operation was a Paste command, the display would read: Undo Last Track Paste? Y /N Press the YES ( ▲ ) button.
editing • chapter 6 64 ADAT HD24 Reference Manual More about editing If you’re familiar with digital audio editing, you know that an abrupt change from one region to another when making an edit can cause a “click” or “pop”. This would happen if the sample number jumps drastically from the original material to the pasted material.
chapter 7 ADAT HD24 Reference Manual 65 High resolution operation 88.2/96 kHz sampling rates The ADAT HD24 has the capability of recording at twice the conventional sample rate. You can record and play back at 88.2 kHz (double the consumer rate of 44.
high sample rates • chapter 7 66 ADAT HD24 Reference Manual How ADAT Optical handles a 96 or 88.2k signal The ADAT Optical “lightpipe” was designed to send eight streams of 24-bit digital audio data at standard sampling rates.
chapter 8 ADAT HD24 Reference Manual 67 Synchronization and MIDI Synchronization MIDI Time Code The HD24 can generate 30 fps MIDI Time Code from its built-in MIDI output. This is the preferred method of synchronizing a MIDI sequencer or drum machine to the HD24.
synchronization and MIDI • chapter 8 68 ADAT HD24 Reference Manual MIDI The HD24’s MIDI jacks are used for synchronization, software updates, and machine control. Press the MIDI button on the HD24’s front panel to scroll between the MIDI function pages.
chapter 8 • synchronization and MIDI ADAT HD24 Reference Manual 69 Using the HD24 with tape-based ADATs The ADAT Sync jacks on the back of the HD24 are designed to allow easy hookup with previous ge.
synchronization and MIDI • chapter 8 70 ADAT HD24 Reference Manual Using the ADAT HD24 with the BRC Master Remote Control The BRC Master Remote Control has been the standard for controlling multi-ADAT systems since its introduction.
chapter 8 • synchronization and MIDI ADAT HD24 Reference Manual 71 • The BRC’s SAVE SETUP TO TAPE and LOAD SETUP FROM TAPE commands (which saves the BRC’s internal data and song setups to the DATA section at the head of an ADAT tape) are not supported by the HD24.
synchronization and MIDI • chapter 8 72 ADAT HD24 Reference Manual Using the HD24 with the M20 The M20 and its remote control, the CADI, have the most advanced synchronization capabilities of any ADAT product. The M20 is designed to meet the needs of video and film post production, including SMPTE synchronization at 44.
chapter 9 ADAT HD24 Reference Manual 73 Using Ethernet When you'd use Ethernet and the HD24 Ethernet i s a method for connecting multiple computers and peripherals (such as printers and disk arrays) in a network.
using Ethernet • chapter 9 74 ADAT HD24 Reference Manual Materials you will need First, you need the hardware and cabling to connect your ADAT HD24 via Ethernet.
chapter 9 • using Ethernet ADAT HD24 Reference Manual 75 Setting the IP parameters of the ADAT HD24 Before you can connect the ADAT HD24 to a computer or network using its Ethernet port, you have to.
using Ethernet • chapter 9 76 ADAT HD24 Reference Manual To set the HD24's password: 1. Press the UTILITY button until the display reads: Util09:FTP Login U ser:"anonymous" 2. If you want to enter a user name, use the arrow keys under the display to place the cursor under the letter you want to change.
chapter 9 • using Ethernet ADAT HD24 Reference Manual 77 Apple Macintosh configuration instructions The Apple Macintosh was designed from the outset to be networked.
using Ethernet • chapter 9 78 ADAT HD24 Reference Manual To change the TCP/IP settings: These instructions assume that your Macintosh is NOT connected already to a network. If you're already on a network, you may need to follow special instructions from the person in charge of it.
chapter 9 • using Ethernet ADAT HD24 Reference Manual 79 To turn on AppleTalk: To communicate with the ADAT HD24, the Macintosh must be set to use AppleTalk, via the Ethernet port. If you're not already doing that: 1. Open up the AppleTalk control panel (Apple menu/Control Panels/AppleTalk).
using Ethernet • chapter 9 80 ADAT HD24 Reference Manual Windows 95/98/ME PC configuration instructions If you own a PC, you must make sure it has an Ethernet port first. If you’ve just purchased a network card, then you need to follow the manufacturer’s instructions for installation.
chapter 9 • using Ethernet ADAT HD24 Reference Manual 81 7. After a few seconds, you will be brought back to the main Network window. The TCP/IP Protocol should now be listed. 8 . Click OK . Windows may ask for original Windows installation files. Supply them as needed.
using Ethernet • chapter 9 82 ADAT HD24 Reference Manual To set the IP address of a Windows 95/98/ME PC: 1. Click the Start button. Choose Settings , then Control Panel . 2. Double-click the Network icon. Your Network window should pop up. Select the Configuration tab.
chapter 9 • using Ethernet ADAT HD24 Reference Manual 83 Verifying a PC's connection to the HD24 Now that you have your PC setup to talk to the HD24, shut the computer down and connect the PC to the HD24. You can do this with a hub, or directly using a crossover cable.
using Ethernet • chapter 9 84 ADAT HD24 Reference Manual Transferring files with Explorer Once you're sure that: • the computer has the correct network settings • the HD24's IP address.
chapter 9 • using Ethernet ADAT HD24 Reference Manual 85 7. Click and hold on an individual track you want to download. Drag it to the desktop (or to a folder).
using Ethernet • chapter 9 86 ADAT HD24 Reference Manual To upload files from the computer to the HD24 After you have edited audio in the computer, you can send it back to the HD24, with certain limitations: • The file name must follow the format "TrackXX.
chapter 9 • using Ethernet ADAT HD24 Reference Manual 87 About the subnet mask The subnet mask is a standard parameter used for TCP/IP networking. On the HD24, the subnet mask is used to determine how many computers are on your local network. For instance, if your HD24 IP address is set to A.
using Ethernet • chapter 9 88 ADAT HD24 Reference Manual To quit FTP server mode Once your transfers are complete, you must leave FTP server mode in order to resume normal recording and playback from the ADAT HD24. 1. Make sure that all downloads are complete and all users have logged off the system.
chapter 9 • using Ethernet ADAT HD24 Reference Manual 89 An Example Network The following network diagram can be used a guide to help you setup your internal network. In this scenario, the internal network consists of seven different elements: The Router, the PC, the Mac, three HD24s and the Hub.
using Ethernet • chapter 9 90 ADAT HD24 Reference Manual.
chapter 10 ADAT HD24 Reference Manual 91 Troubleshooting Troubleshooting Index If you experience problems while operating your ADAT HD24, please use the following table to locate possible causes and solutions before contacting Alesis Product Support for assistance.
troubleshooting • chapter 10 92 ADAT HD24 Reference Manual Symptom Cause Solution Empty caddy Install an IDE drive in the caddy Drive improperly inserted Remove the drive and reinsert, firmly pushin.
chapter 10 • troubleshooting ADAT HD24 Reference Manual 93 Avoiding ground loop noise In today’s studio, where it seems every piece of equipment has its own computer chip inside, there are many opportunities for ground loop problems to occur.
troubleshooting • chapter 10 94 ADAT HD24 Reference Manual Care and Maintenance Cleaning Disconnect the AC cord, then use a damp cloth to clean the ADAT HD24’s metal and plastic surfaces. For heavy dirt, use a non-abrasive household cleaner such as Formula 409™ or Fantastik™.
chapter 10 • troubleshooting ADAT HD24 Reference Manual 95 Obtaining Repair Service Before contacting Alesis, check over all your connections, and make sure you’ve read the manual. Customers in the USA and Canada: If the problem persists, call Alesis USA at 1-800-5-ALESIS and request the Product Support department.
troubleshooting • chapter 10 96 ADAT HD24 Reference Manual.
ADAT HD24 Reference Manual 97 Specifications AUDIO INPUT Input Connectors: 24 Balanced 1/4" TRS jacks Nominal Input Level: +4 dBu (1.23 V RMS ) = -15 dBFS Maximum Input Level: +19 dBu (6.9 V RMS ) = -0 dBFS Input impedance: 10 k Ω AUDIO OUTPUT Output Connectors: 24 Pseudo-Balanced 1/4" TRS jacks Nominal Output Level: +4 dBu (1.
specifications 98 ADAT HD24 Reference Manual Dimensional drawing.
ADAT HD24 Reference Manual 99 Index 16-bit, 25 20-bit, 25 88.2 kHz, 65 96 kHz, 65 96kHz converter board option, 66 AC power and noise, 93 ADAT, 24 synchronization with, 69 ADAT FST™, 3 ADAT Optical,.
index 100 ADAT HD24 Reference Manual scan, 41 scrub, 35 for edit points, 57 scrubbing, 41, 69 from M20/CADI, 72 selecting drives, 49 SET LOCATE, 44, 55 shock, 7 slave, 69 SMPTE time code, 70, 72 Snake.
ADAT HD24 Reference Manual 101 Alesis Limited Warranty ALESIS CORPORATION ("ALESIS") warrants this product to be free of defects in material and workmanship for a period of one (1) year for parts and for a period of one (1) year for labor from the date of original retail purchase.
An important point after buying a device Alesis ADAT-HD24 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Alesis ADAT-HD24 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Alesis ADAT-HD24 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Alesis ADAT-HD24 you will learn all the available features of the product, as well as information on its operation. The information that you get Alesis ADAT-HD24 will certainly help you make a decision on the purchase.
If you already are a holder of Alesis ADAT-HD24, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Alesis ADAT-HD24.
However, one of the most important roles played by the user manual is to help in solving problems with Alesis ADAT-HD24. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Alesis ADAT-HD24 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
