Re: Euphoria Sound System?
I have a SB-AWE32 pnp (with a Yamaha DB50XG daughterboard).
I can try it out if you want. sounds interesting anyway.
Riwal Raude
rauder at thmulti.com
> -----Original Message-----
> From: Nick Metcalfe [SMTP:metcalfn at ALPHALINK.COM.AU]
> Sent: Tuesday, October 12, 1999 7:14 PM
> To: EUPHORIA at LISTSERV.MUOHIO.EDU
> Subject: Euphoria Sound System?
>
> I am in the process of writing a new 16-bit wave + midi Euphoria sound
> library for dos, and have struck some problems. I'm thinking of calling
> it "Euphoria Sound System", or ESS for short. I plan for it to be a
> major improvement on previous Euphoria sound libraries, with
> simultaneous operation of one or two 8 or 16-bit sound cards, interrupt
> driven midi and multi-format sequencer, direct-to-disk
> recording/playback, real-time wave mixer and effects, and probably
> editable OPL2/3 instrument banks as well. I am actually not very far
> into it, and it is an ambitious project at best.
>
> -- Firstly, I wish to recruit a bugtester or two. If you have a true
> 16 bit Sound Blaster (DSP version >= 4.00, SB16 / AWE32 or
> compatibles?), _and_ a midi plug adapter for the SB's gameport, you
> could help me greatly by verifying my code is silly and not my sound
> card. Just have to connect midi in to midi out, run my buggy program,
> listen to the hum for a bit and tell me what pops out under "Errors:".
> Please contact me if you can help, the code's a bit big for posting on
> the list.
>
> Basically, I'm currently trying to get both 16-bit sound and the MPU-401
> midi interface to work simultaneously on the newer SB's. The good news
> is it works. The bad news is not properly. When the DSP is producing
> sound and the MPU is set and ready, somehow single 0 value bytes are
> occasionally and randomly sent _out_ the MPU midi port. These can be
> captured by the looback to be studied, but reveal very little except how
> well they're going to corrupt any real outgoing midi messages. If the
> program can be run by somebody without producing these glitches, I will
> buy me a new sound card.
>
> These glitches will happen even when the routine that actually has the
> job of sending data out the MPU is completely removed. Either side
> works independently just fine. 8 or 16 bit waves with the MPU turned
> off, fine. Midi loopback with no waves playing, fine. Together,
> Glitches! I have massaged the code many times to no avail, and I
> finally think the problem could be hardware. This seems unlikely too,
> though. I have a SB16 PnP DSP Ver 4.13 and it doesn't appear to play up
> any other time... confusing.
>
>
> -- Secondly, I would like to access INT #21 for dos file operations and
> wish to do so from within an assembly routine, not using the
> dos_interrupt() function. Are there any special procedures that must be
> undertaken with regards to the Causeway extender to do this? It is to
> be accessed from an interrupt service routine.
>
> Also on the same topic, how do I initialize a segmented pointer to a
> low-memory buffer [ds:si] for what I assume is 16-bit code when all I
> have is the linear 32-bit address of the buffer and I want to sort of
> keep my data segment? I'm not sure how to use the lea instruction in
> this context. Also all in assembly for the same direct-to-disk
> recording or playback ISR...
>
> Anyway, I'm stumped. Please, help me out if you can.
>
> --
> Nick Metcalfe <metcalfn at alphalink.com.au>
> http://www.alphalink.com.au/~metcalfn
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