Hi Stas, On Sun, Jul 13, 2003 at 03:47:28AM +0400, Stas Sergeev wrote: > Hello. > > Ryan Underwood wrote: > >>dosemu, or it is somehow possible to use dmix via an > >>OSS emulation layer? > >The synth server's output would be completely separate > >from the application using it, so the synth could use > >ALSA where dosemu could still use the OSS emulation. > Yes. But I was wondering will they be able > to use dmix both. Is it available via the > OSS emulation layer at all?
Unfortunately not without the wrapper. The dmix is done in userspace, so writing to /dev/dsp kernel device would bypass it. The aoss wrapper intercepts those writes and puts them through alsalib instead, allowing dmix to be used. > >Yeah. Also what about sending pc-speaker output to the > >dsp? > Yes. I wanted to mention that in my previous > posting but was distracted and forgot. > This will require translating the 6-bit PDM > stream to a 8-bit PCM stream. This is very > easy IIRC, I think I've done something like > that in my ZX Spectrum emulator back in 1995. > Dosbox is doing that so (considering other > messages in that ML today) also we have to:) > Would be nice to see that in your lib. This > will require an additional stream, but what's > the deal provided we have the dmix. Interesting. It would fit the model of the library because I am supporting any synth that is accessed only through port writes and nothing more complicated like interrupts/DMA. The PC speaker would seem to fit that model, so if you have some emulation code, I should be able to include it. This would help in portability effort too. > >>So does it interact with ALSA, or you decided to do it > >>a standalone? > >(1) Theoretically, it can output to either ALSA or OSS, > >though I use ALSA to test it. > There was a discussion in the past where you > said you'll make it the timidity-sequencer alike > plugin for alsa. I was asking about that. Now > It seems you decided to make it completely > standalone. Yeah, that is going to be a separate thing, since this libsynth supports any synth you want, whereas there is only MIDI sequencer for the OPL3, so only a emulated-OPL3 sequencer client would make any sense. > >Once that is complete I can implement the emulator core > >as an ALSA sequencer client, which if dosemu had alsa > >support, it could connect to that sequencer slot and use > >the MT-32. Or else maybe something could be done with > >midid? > midid is fully functional and together with > timidity it can provide you with General Midi > and (limited) MT-32. I've heard timidity is not > powerfull enough for the *real* MT-32, so they > (dosbox) needed their own code, but I am not > a musician and what timidity produces sounds > rather good for me. It may be possible to implement another backend to timidity but that would require more research. If the timidity/mt-32 emulator becomes an ALSA sequencer client (which is the optimal situation so it can be used in any ALSA application), how would dosemu/midid support it? > >Is midid a good idea to keep around for the long > >term? > Yes. Among other things it allows to capture > your favourite music from games into a .mid files. Interesting. What about making the ALSA sequencer a backend for midid? -- Ryan Underwood, <nemesis at icequake.net>, icq=10317253 - To unsubscribe from this list: send the line "unsubscribe linux-msdos" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
