These sync sounds

luisi · 22 Jul 2006

jobro wrote: How do you make them in SM?

maybe try to reset phase input

AngularMomentum · 24 Jul 2006

Sync is something I use in almost every SE synth I built. It would be nice to have a sync built in the standard SM osc's a la SE.

sambean · 24 Jul 2006

Here's my attempt at a hard sync osc:

http://magalov.myweb.hinet.net/osc/HSosc.osm

😀

luisi · 24 Jul 2006

sambean wrote: Here's my attempt at a hard sync osc:

http://magalov.myweb.hinet.net/osc/HSosc.osm

😀

you crazy SM hacker!, <grin>

angstrom · 24 Jul 2006

Yes Sambeans sync is the best available, and while it is a great feat of engineering - I do still wish we could have a sync input (retriger duty cycle) on the default oscillators though (and the wavetable)

that would be fantastic.

I have synths I built in SE which I cant re-make in SM because the hard-sync is so much a part of their sound.

dreamkeeper · 24 Jul 2006

Hm, crashes SM here as soon as I hit a key. 🙁

Also, anyone care to explain what the hack(sic) is going on there, preferably in layman's terms? I don't understand one bit of the schematic (ok, that doesn't say much...). Or a link maybe? TIA

😕 - werner

sambean · 24 Jul 2006

hm..

Shouldn't crash, works fine here.. perhaps I used SSE2 commands in the asm, do you know if you have SSE2 on your computer?

Devs, is 'cvtps2dq' SSE2 only?, why can we not use the SSE cvtps2pi?

It's just basically an osc, with the option to reset the phase and the option to choose different waveforms using a stream input. I made it some time ago when working on an optimised drumsynth before there was the wave read with WIndex input..

How does it work? It's a wavetable player which has a bandlimited wavetable for each octave. It takes the frequency input, uses this to choose which wavetable to play through the 'Offset Calc', this is to stop any aliasing, the rest is just optimized interpolation.

I wanted it to work real fast so thats why I converted some parts over to asm and used all the coversion to and from integer for the interpolation, all this is going on 'under the hood' so should just work without the need to adjust anything.

If I get a chance I make an unoptimized version and see if its possible to make an SSE only version, to compliment this one and put them both on the wiki, along with a bit of explanation..

Hope this helps,

Sam

dreamkeeper · 24 Jul 2006

Sam - thanks a lot, mate! 🙂

As far as I can tell, I don't have SSE2 here, it's an older Athlon. I think one of the 1st builds that provided SSE. So, that could be the reason.

Seems I have yet some homework to do, but things are beginning to clear up a bit thanks to your explanation. I didn't realize that the mem module is holding a wavetable. So, yes, that did help! Thanks again!

cheers, werner

sambean · 2 Aug 2006

Hey Peepos,

I've had another crack at the hard sync osc, I think this version is a bit faster than the previous, and I think it should be usable on SSE only machines (fingers crossed).. It could probably be even faster but we're missing something from SM atm, request filed 😉 ...

Let me know if it works/any problems/quality issues and I may put it on the wiki.

It uses some integer maths so I had to delve into the asm module, but I've made an attempt to explain whats happening in the 'doc' module inside..

GetMeHere

Enjoy!

Sam

TheAudiophileDutchman · 2 Aug 2006

Hey Sam,

Just wanted to testdrive your hardsync solution on a PIII while running SM v0.9.5z, but......

What version of SM are you using?

I'm asking, because I got the following error message: "This file is not compatible with the your version of Synthmaker" (by the way, 'the' should be removed from this message i.m.h.o.).

dreamkeeper · 2 Aug 2006

I hate to say it, but I'm getting a "file not compatible..." message here (yes, I do have the latest SM build). Tried 3 downloads, in case it got corrupted - no luck! 🙁

angstrom · 2 Aug 2006

too busy with work to try it right now, but a little bird tells me Malc is working on a sync input to the standard oscillators.

😀

jobro · 2 Aug 2006

Same problem for me as well.

sambean · 3 Aug 2006

Apologies guys!

I'd forgotten that Malc had sent me a modified version to test a bug problem I was having, hence the versions of SM being incompatable..

I'd follow the wisdom of the little bird in angstoms ear.. By the time the new version is out, you may not need this anyway..

I'll keep it here for reference though.

Sam