SOUNDRIVE / COVOX ports on original ZX Spectrum

[solegstar]

If exist only some pieces of software for PROFI stereo D/A then I can rewrite D/A ports in software and not support old PROFI ports.

In Extreme tracker 1.31-1.41, 2.10

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[VELESOFT]

SAMPLE TRACKER is old Czech tracker, later modified for tr-dos and russian D/A ports. But I see some limits:

SOUND TRACKER support 3 sound channels, originally writed for Czech D/A with 3 channels and ACB stereo with ports #1F,3F and 5F.

This TRDOS version support three D/A modes:
1) COVOX 1 - single channel #FB (one channel)

2) COVOX 2 - PROFI stereo COVOX ports #3F and #5F

3) COVOX 4 - SOUNDRIVE 4 channels on ports #0F,#1F,#4F,#5F. Only in this mode is possible play all 3 channels with good quality. ACB are emulated via sending 3rd music channel to secondary left and right soundrive channels. :-)

In emulator REALSPECTRUM is impossible use LOAD operations in menu, show error (disc not exist...or similar...)