tinctu wrote:Send me any news of replace old YM to new AY8930 in ST project... /e-mail/
And "how can I do that..."!
Stefan jL wrote:I emailed Tao and he was not too enthusiastic about doing this beacuse of the muffled sound as more changes needed to be done.
unseenmenace wrote:I wonder if it would sound any better if you connected the output pins from the AY directly to a jack socket rather than going through the ST's sound circuitry at all?
simonsunnyboy wrote:Hooking it up is no problem...but having software taking advantage of the freshly connected chip is the main problem.
So some initial thoughts about it:
The expanded tonal range for the square wave will allow deeper bass
frequencies - thats something important, as the YM2149 is the ST could do
with an extra lower octave I think.
DIFFICULTY: Easy or Hard to include in maxYMiser. Its easy to add a few
useful extra bass notes, but using the whole range is likely to be very
challenging as of course I special-cased the whole note range to the
Having three envelope generators is a real joy. All sorts of nice things
will be possible - three channel sync buzzer for example - just to name
DIFFICULTY: Easy. In fact alot of special cases exist to multiplex three
channels down to one real envelope.
Its possible to set the square wave duty cycles on all three channels
seperately. You could use this for very low CPU usage SID effects. By
setting these at fast rates, I can imagine some wild effects would be
DIFFICULTY: Hard. Big GUI change necessary - pain in the arse stuff.
There are two eight bit 'noise mask' registers.. Who can tell what sort of
effects could be achieved with those.
DIFFICULTY: Hard. Again, shitty GUI stuff.
Making YM2149 and AY3930 modes coexist in the same sound driver might be a
bit challenging. By allowing noise mask and duty cycle to be changed at
audio frequencies (with a timer) you might be able to get some cool stuff
- again its more work... But at least no GUI change would be needed for
that. maxYMiser timer routines have some mildly horrific devpac macros to
achieve decent speed considering their flexibility, its Medium difficulty
a few extra notes:
you get an extra bit of amplitude precision - very useful indeed. Should
give the possibility for higher quality digidrums too.
you get three extra bits of noise period range. again - a welcome
bullis1 wrote:So what you're saying is that it now needs some kind of amplifier instead of a resistor? That's kind of annoying. It wouldn't bother me as I have my ST patched into a Behringer mixing board, and I could amplify it from there but for most people that sucks. However, I'm thinking that only musicians would be interested in this mod anyway.
Stefan jL wrote:I was hoping it would work on STE also and there YM is mixed with DMA sound, so if an external amplifier is used then the DMA also need to go thru it. And yes this is probably more interesting for musicians (the micromusic scene) and those who want to use their real Ataris to listen to the music instead of emulators
Users browsing this forum: No registered users and 5 guests