README.TXT ========== This file contains additional information to supplement the manual. Please read all the sections before you proceed with the installation. This file contains the following sections: 1. Environment Variables 2. Maximum Recording Rates For the audio hardware 3. Acknowledgement 1. ENVIRONMENT VARIABLES There are three environment variables used to signify information of our audio hardware : SOUND, BLASTER and MIDI. These variables will be setup during your audio software installation. SOUND environment variable The SOUND environment variable specifies the directory location of audio drivers and software. The command for setting the SOUND environment variable is as follows: SET SOUND= Note that there is no space before and after the = (equal) sign. BLASTER environment variable The BLASTER environment variable specifies the base I/O address, interrupt number and DMA channel hardware configuration of the audio hardware. The command for setting the BLASTER environment variable is as follows: SET BLASTER=A220 I5 D1 H5 P330 T6 Where: A Specifies the audio hardware base I/O port I Specifies the interrupt request line D Specifies the Low DMA channel H Specifies the High DMA channel P Specifies the MPU-401 base I/O port T Specifies the card type Note that there is no space before and after the = (equal) sign, but there must be at least one space between two settings. 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. The command for setting the BLASTER environment variable is as follows: SET MIDI=SYNTH:<1/2> MAP: 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 2. 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. ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÑÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ» º SYSTEM ³ RECORDING RATE º ÌÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍØÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ͹ º ³ º º 386 and above ³ Stereo - 44KHz º º ³ Mono - 44KHz º º ³ º ÇÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄĶ º ³ º º 386 SX and below ³ Stereo - 22KHz º º ³ Mono - 44KHz º º ³ º ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÏÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ To obtain optimal performance, try configuring the audio hardware to use a high DMA (Direct Memory Access) channel under Windows. Refer to your audio hardware Getting Started Manual for more information on setting up the sound card to use a high DMA channel. 3. ACKNOWLEDGEMENT The included version of SB16FM.DRV is from Voyetra Technologies. ******** END OF README.TXT ********