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24-Track, 96kHz Hard Disk Recorder
  • Overview
  • Key Features
  • Tech Specs
  • Documents & Downloads
HD24XR is the world's first 96kHz, 24-track hard disk recorder designed to fit into any ADAT environment and match ADAT's legendary performance and affordability.

HD24XR is built exclusively for the purpose of recording music instead of data, resulting in remarkable stability and performance. HD24XR enables engineers to record up to 24 tracks of high-resolution 24-bit recording at 44.1, 48 kHz, and 12 tracks at 88.2, and 96 kHz sample rates. HD24XR features the same A/D and D/A converters used in the acclaimed MasterLink.

Two hot-swappable media bays provide convenient access to recording drives and allow data backup in minutes. You can edit tracks internally or easily transfer to computer via an Ethernet connection.

HD24XR features ADAT Optical and ADAT Sync, enabling it to work efficiently with existing systems. It offers the same exceptional user-friendly interface ADAT users have come to expect.

HR24XR packs 24 channels of digital audio I/O into a single-unit recorder that easily fits into any environment.
  • 24-track, 24-bit digital audio recording, 12 tracks at 96kHz
  • 24 analog inputs (1/4" TRS)
  • 24 analog outputs (1/4" TRS)
  • 24-channel ADAT Optical I/O
  • Dual recording bays utilize standard, low-cost, removable IDE computer drives
  • Instant random access to audio using ADAT/FST™ (File Streaming Technology).
  • Internal editing capabilities include cut, copy, paste, and track-move with undo.
  • Multiple units can be synchronized to create a larger system
  • Easily integrated into an existing ADAT system
  • Ethernet port enables computer connection
  • MIDI I/O, MTC out
  • ADAT Sync in/out
  • Word Clock in
  • Caddy 1: 40GB HD
  • Caddy 2: empty
  • Caddies can be fitted with IDE/EIDE/ATA drive at 5,400/7,200/10,000 RPM up to 2TB

  • 24 tracks at 24-bit, 44.1 or 48 kHz
  • 12 tracks at 24-bit, 88.2 or 96 kHz


  • Analog: 24 24-bit inputs, 24 24-bit outputs (1/4" TRS, +4dBu).
  • Digital: 24-channel I/O via 3 ADAT Optical inputs and 3 ADAT Optical outputs.
  • Other: MIDI in/out. Alesis Sync in/out (DB-9). Word Clock input (BNC, 75). Footswitch jack for punch in/out (1/4"). LRC input for traditional wired remote (1/4"). 10 Base-T Ethernet (RJ-45).


  • Frequency response: 20Hz–20kHz +0/–1dB
  • Dynamic range: 103dB A/D, >103dB D/A (A-weighted)
  • Distortion: <0.003% THD+N
  • Input levels: nominal +4dBu, maximum +19dBu
  • Pitch control: +100 cents/–200 cents, min-max 30–50kHz (30–100kHz with version 2.0)


  • Power: 90-230V AC, 60W
  • Dimensions (H x W x D): 5.09" x 19" x 17" (127mm x 483mm x 432mm), 3U rackmount
  • Weight: 20lbs (9.07kg)
Live DocumentsType
Product Overviewhtml
Manuals & DocumentationSizeType
HD24 - Product Overview
122 KBpdf
HD24XR - Product Overview
190 KBpdf
HD24 & HD24XR - Reference Manual
4 MBpdf
HD24 & HD24XR - Reference Manual (French)
2 MBpdf
HD24 & HD24XR - EC-2 Reference Manual Addendum
524 KBpdf
HD24 - Alternative file transfer options for Win 7 and Mac OS X
88 KBpdf
Software & DriversSizeType
HD24 & HD24XR Firmware v1.21
This is version 1.21 of the HD24 & HD24XR Firmware. This adds support for SATA hard disks when used with the following caddies: the Alesis HD24 SATA Caddy part n0. 7-10-01-451, and the ViPowER SATA Caddy.
333 KBzip
HD24 & HD24XR Firmware v1.20
This is version 1.20 of the HD24 & HD24XR Firmware. This fixes a bug where the unit would hang upon entering the clock rate page in the Utility menu. Specific information for this release can be reviewed in the Release Notes.
336 KBzip
HD24 & HD24XR Firmware v1.18
This is version 1.18 of the HD24 & HD24XR Firmware. This fixes a couple of bugs related to the transport controls.
332 KBzip
FST/Connect Update - v1.00 to v1.01 for Mac OS X
This is version 1.01 of the OS-X FST/Connect software for the Alesis Fireport.
Compatible with Mac OS 10.4.11 and Leopard 10.5.
This release of FST/Connect contains bug fixes for some import and export operations.
1 MBzip
FST/Connect - v1.05 for Windows Vista
This is version 1.05 of the Windows FST/Connect software for the Alesis Fireport. This release of software is for Windows Vista users only. Details of the changes to this version may be found in the Release Notes.
5 MBzip
FST/Connect Update - v1.03 to v1.04 for Windows
4 MBexe
FST/Connect Update - v1.02 to v1.04 for Windows
4 MBexe
FST/Connect Update - v1.00 to v1.04 for Windows
4 MBexe

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