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70 ASUS Audio User’s Manual
MIDI Environment Variable
The MIDI environment variable specifies the MIDI file format used and where the
MIDI data is sent to. The MIDI data can be sent to FM chips or audio hardware
MIDI port. Generally, there are three MIDI file formats available in the market,
General MIDI, Extended MIDI and Basic MIDI. You can type “SET” at the DOS
prompt and see the following line for the setting of the BLASTER environment
variable:
MIDI=SYNTH:<1/2> MAP:<G/E/B>
Where:
SYNTH: 1 Specifies internal synthesizer (default)
2 Specifies audio hardware MIDI port
MAP: G Specifies General MIDI file format
E Specifies Extended MIDI file format (default)
B Specifies Basic MIDI file format
Maximum Recording Rates for the Audio Hardware
The sampling rate used for recording is largely influenced by your computer’s main
processor. To obtain 16-bit digital audio using Windows, the following maximum
recording rates are suggested.
SYSTEM RECORDING RATE
386 and above Stereo - 44KHz
Mono - 44KHz
386 SX and below Stereo - 22KHz
Mono - 44KHz
To obtain optimal performance, try configuring the audio hardware to use a high
DMA (Direct Memory Access) channel under Windows. Refer to your audio hard-
ware Getting Started Manual for more information on setting up the sound card to
use a high DMA channel.
Win3.x Audio Drivers
Environ. Variables
Win3.x Audio Drivers