VAI-40 USB Audio Interface

Compact metal body with high definition sound!

The VAI-40 is an audio interface designed with simplicity for easy operation and enables multi channel recording via USB with high definition sound. This compact metal body audio interface is compatible with professional DAW and DJ application software, applicable to live setups on stage and is suitable for recording & saving vinyl to computers whilst monitoring.

  • Equipped with Monaural 4in / Stereo 2out (Master out L, R, Monitor/ Booth out L, R), Headphone monitor output. The VAI-40 provides a high definition sound, thanks to the audio codec IC designed with a built-in hardware sample rate converter, delta-sigma conversion 20bit stereo D/A converter and 18bit stereo A/D converter.
  • Full support for ASIO2.0(Windows), MME/WDM(Windows) and CoreAudio(Mac OS X)
  • ESI(Ego systems Inc) designed ASIO driver applied for its proven high reliability. DAW application software and DJ application software work with the driver at a valiant low latency rate and high performance. (Windows will identify the VCM-100 as a 2in2out USB audio device when using the standard Windows WDM driver. Use the ASIO driver when using multi input/output with DTM application software.)
  • The VAI-40 runs on USB bus power, allowing it to be compact, and the metal body is thin but highly durable, and convenient for transportation.


  • Intel Pentium II 450MHz CPU or comparable AMD CPU (or equivalent)
    we recommend at least a Pentium III CPU with 600 MHz
  • Windows 98SE, ME, 2000, XP,Vista, Windows 7 operating system
  • 1 available USB port- at least 128MB RAM
  • high quality audio software with ASIO support strongly recommended
    ※NOTE : To use VAI-40 by Vista or Windows 7, Use NEW driver.


  • Power Macintosh G3 or higher
  • 1 available USB port
  • at least 256MB RAM
  • Mac OS X 10.6 (10.7 not compatible)
    ※NOTE : To use VAI-40 by Mac OS 10.6(Snow Leopard), here is clicked.


USB spec version 1.1
USB audio class spec version 1.0

[Analog section]

1. Sample Rates
44.1kHz, 48kHz
2. Analog Input
1) connector type: 4 channel analog inputs
* 4 RCA connectors (line in 1 and 2)
2) -10dBV input level, unbalanced
3) impedance: 10K Ohm
3. Analog Output
1) connector type: 4 channel analog line outputs
* 4 RCA connectors (line out 1 and 2)
2) -10dBV output level, unbalanced
3) impedance: 100 Ohm
4. Headphone Amplifier
1) THD+N/S: -70dB, 0.03% (typical)
2) output power: 60mW max
3) signal to noise ratio: 110dB (typical)

[Digital section]

1. Sample Rates
44.1kHz, 48kHz
2. A/D Converter
1) resolution: 18-bit
2) dynamic range: 85dBA
3) frequency response: 20~20KHz (@ fs=48kHz)
3. D/A Converter
1) resolution: 20-bit
2) dynamic range: 87dBA
3) frequency response: 20~20KHz (@ fs=48kHz)

[Driver / Software]

1. ASIO 2.0 support (Windows)
4 input channels / 4 output channels
2. CoreAudio support (Mac OS X)
4 input channels / 4 output channels
3. MME/WDM support (Windows)
2 input channels / 2 output channels


Power : USB bus power 250mA max
Dimensions : 72(W)×206(D)×30(H)mm
Weight : 0.7 kg