Waveform mix on one osc

[SounDuke]

Hi, maybe I didn't pay attention to the info's on the site, but as I'm about to finish the front panel for step C of mbsid with 4 8580, I was looking at the template by TK. On the osc section, I see a button and 4 leds to change the waveform of the currently selected osc. Then I thought "how can I configure an oscillator from the control surface to output a mix of square and triangle wave (this is doable with the VST sidcontrol plugin by S.M.) to listen to the odd and typical waveform found on many sid tunes? If someone who has built the CS can answer this he'll have my gratitude ;)

[QBAS]

I`m not sure but probubly it is in repeat mode: first only basic waveform, next mixed ones. The same is on lcd by rotary encoder or switches. I`m stopped with finishing now, becouse I have no idea how creating panel. Can you share picture please?

[SounDuke]

Gee I have no camera, but as soon as I finish everything I'll post picture no doubt!

[Wilba]

The button toggles through: Tri, Saw, T+S, Pul, P+T, S+P, PST, Noi, off

I think you can change a setting in the firmware setup so it doesn't use mixed waveforms (6581 doesn't have mixed waveforms).

[SounDuke]

nono they're VERY?IMPORTANT it's an homicide to kill off waveform mix! thank you for the info

[seppoman]

(6581 doesn't have mixed waveforms).

Sorry, but I don´t think that´s true. I can select all mixed waveforms with my 6581 and they definitely sound different than the "pure" waveforms.

Seppoman

[Wilba]

Sorry, my mistake... the 8580/6582 have the correct "logical AND" of the waveforms and the 6581 has something different... I recall they were inaudible on my 6581... a quote from the manual:

http://www.midibox.org/dokuwiki/doku.php?id=midibox_sid_v1_manual

Note: if a MOS 6581 is used, it is possible that on mixed waveforms the sound output is much lower or unhearable. This is due design bugs in the chip - the 8580 can handle mixed waveforms much better