
Symphony I/O Mk II | HD
Multi-channel Audio Interface for Pro Tools HD on macOS and Windows Systems
Pro Tools Plus Configurations
2×6 SE
$4,525
Pro Tools Plus
Connect 8
$5,475
Pro Tools Plus
16×16 SE
$6,045
Pro Tools Plus
32×32 SE
$8,915
Pro Tools Plus
Low Cost Per Channel. Superior Sound Quality.
Symphony I/O Mk II HD is designed for the Pro Tools HD user who needs a multi-channel audio interface with the best sound quality at an incredible cost per channel value. Whether using a Mac or PC based studio, Symphony I/O Mk II HD can connect directly to your Pro Tools HDX, Pro Tools HD Native or Pro Tools Core/Accel systems.
Symphony I/O Mk II HD can be utilized alongside or in place of Avid® or Digidesign® interfaces for Pro Tools HD. In fact, each I/O module installed in Symphony I/O Mk II HD appears and functions in Pro Tools HD the same if it were a separate Avid HD I/O interface, so set up is easy and you can take advantage of important Pro Tools features such as sample-accurate delay compensation.
A single Symphony I/O Mk II HD unit can have up to 32 simultaneous analog I/O, so you can have more channels with less rack gear. Need even more channels? You can utilize multiple units simultaneously, with one Symphony I/O Mk II HD per every Pro Tools HD port in your system. Calibrating your I/O is easy with Symphony I/O Mk II HD’s front panel touchscreen.
Highlights
- Best performance of any multi-channel Pro Tools HD interface
- Best cost per channel value of any Pro Tools HD interface solution
- Connects directly to any Pro Tools HD system (Mac or PC)
- Emulates Avid HD I/O interface, including sample-accurate delay compensation
- Connect multiple units in a single system (1 unit per HD port)
- Easy I/O calibration with front panel touchscreen



Pro Tools | HD over-IP made easy
If Pro Tools is part of your network environment, Symphony I/O Mk II’s Pro Tools | HD peripheral port lets you route audio between your Pro Tools session, the Dante network and Symphony I/O Mk II modules, no need for an additional, stand-alone box.
Connecting to Pro Tools HD
Avid HDX

Avid Native HD Thunderbolt

Avid HD Native PCI

Avid HD Core/Accel

Configuration Information
2×6 SE
Pro Tools HD
$4,525
Inputs
- Analog IN: 2 balanced inputs on 2 female XLR connectors
- AES IN: Stereo input on 1 female XLR connector
- Optical IN: Supports ADAT, SMUX & S/PDIF
- ADAT: 8 channels 44.1-48 kHz on 1 Toslink connector
- SMUX: 4 channels 88.2-96 kHz on 1 Toslink connector
- S/PDIF: 2 channels, up to 96 kHz on 1 Toslink connector
- S/PDIF Coax IN: 2 channels, up to 192 kHz on 1 RCA connector
A/D
- THD+N of -116dB @23dBu (0.00016%) unweighted
- Dynamic range: 124 dB (A) of dynamic range
- Maximum input levels:
- +4dB setting: +24dBu
- -10dB setting: +6dBV
- Frequency response at 44.1kHz: 1-20,000 Hz (+/- 0.05dB)
- Input impedance: 10K
Outputs
- Analog OUT: 6 balanced outputs on 1 DSUB 25-pin connector
- AES OUT: Stereo output on 1 male XLR connector
- Optical OUT: Supports ADAT, SMUX & S/PDIF
- ADAT: 8 channels 44.1-48 kHz on 1 Toslink connector
- SMUX: 4 channels 88.2-96 kHz on 1 Toslink connector
- S/PDIF: 2 channels, up to 96 kHz on 1 Toslink connector
- S/PDIF Coax OUT: 2 channels, up to 192 kHz on 1 RCA connector
D/A
- THD+N of -118dB @ 22dBu (0.00013%) unweighted
- Dynamic range: 131dB (A) dynamic range
- Max output levels – ∞ to +24dBu
- Frequency response at 44.1 kHz: dc to 20kHz (+/- 0.05dB)
- Output impedance: 25 Ohm
Connection: Pro Tools | HD
Performance: 44.1kHz – 192kHz
Compatibility: macOS or Windows
Control: Front panel touch screen
Connect 8×8 MP
Pro Tools HD
$5,475
Inputs
- Analog IN: 8 balanced inputs on 1 DSUB 25-pin connector
- 8 microphone preamps with up to 72dB of gain
- Featuring Advanced Stepped Gain Architecture™
- *AES-EBU IN: 8 inputs on 1 DSUB 25-pin connector
- (192k single wide compatible)
- *Optical IN: Supports ADAT, SMUX & S/PDIF
- ADAT: 8 channels 44.1-48 kHz
- SMUX: 8 channels 88.2-96 kHz
- S/PDIF: 2 channels, up to 96 kHz
- Coax IN: 2 channels of S/PDIF, up to 192 kHz
Outputs
- Analog OUT: 8 balanced outputs on 1 DSUB 25-pin connector
- *AES-EBU OUT: 8 outputs on 1 DSUB 25-pin connector
- (192k single wide compatible)
- *Optical OUT: Supports ADAT, SMUX & S/PDIF
- ADAT: 8 channels 44.1-48 kHz
- SMUX: 8 channels 88.2-96 kHz
- S/PDIF: 2 channels, up to 96 kHz
- Coax OUT: 2 channels of S/PDIF, up to 192 kHz
Connection: Pro Tools | HD
Performance: 44.1kHz – 192kHz
Compatibility: macOS or Windows
Control: Front panel touch screen
16×16 SE
Pro Tools HD
$6,045
Inputs
- Analog IN: 16 balanced inputs on 2 DSUB 25-pin connectors
- Coax IN: S/PDIF on 1 RCA connector
Outputs
- Analog OUT: 16 balanced outputs on 2 DSUB 25-pin connectors
- Coax OUT: Supports SPDIF on 1 RCA connector
Connection: Pro Tools | HD
Performance: 44.1kHz – 192kHz
Compatibility: macOS or Windows
Control: Front panel touch screen
32x32SE
Pro Tools HD
$8,915
Inputs
- Analog IN: 32 balanced inputs on 2 DSUB 25-pin connectors
- Coax IN: S/PDIF on 1 RCA connector
Outputs
- Analog OUT: 32 balanced outputs on 2 DSUB 25-pin connectors
- Coax OUT: Supports SPDIF on 1 RCA connector
Connection: Pro Tools | HD
Performance: 44.1kHz – 192kHz
Compatibility: macOS or Windows
Control: Front panel touch screen