As you can see in mbhp_8xsid_c64_psu_optimized.pdf, the second SID module is connected to the same port as the first one. Just only the MBHP_SID:J2:SO input is connected to MBHP_CORE:J14 instead, so that the core module can access the SID registers individually.
regarding the 6 voices - that is possible using the Multi or Drum engine as these sound engines are using the simpler one oscillator voices. The Lead engine doesn’t provide more than one voice, it does three oscillator sounds with various stereo modulation features.
Hopefully seppoman or somebody else will chime in here as my knowledge of internal workings of MIDIbox SID is pretty bare (practically non-existant)…
For the CORE8, MIOS 1.9g is the latest version of MIOS, I’m not sure where you got MIOS 2.0 from? There is MIOS32 which runs on a different hardware platform (STM32) but there isn’t (currently) a released version of MIDIbox SID for MIO32.
Unless you mean MIDIbox SID v2? This runs on top of MIOS 1.9g but it does require a PIC18F4685 based CORE8.
Can you connect multiple SIDs in parallel to one Core, to get a “unison” kind of sound?
Yes, this feature is available starting with the MIDIbox SID 2.0.
Is this next piece still relevant?
As TK says: you can connect multiple SID modules to one core module, in this case they always listen to the same control data. But the audible effect isn’t really so interesting. If you are having two identical SIDs, then the volume will just be doubled (the oscillators are digital and therefore always output exactly the same waveform). This option can make sense if you want to switch between 6581 and 8580 because of the different filter characteristics. But for really interesting (especially fat) sounds, seperate cores are the best option, so that the SID parameters are modulated independent from each other. The result is much more analog-like(especially when the LFOs are in freerunning mode and the finetune/portamento/ENV parameters are slightly different).
Can we have more SIDs in one MB SID?
TK: As always I have to define such specs before beginning with the implementation. First I thought that controlling two SIDs from one control surface is sufficient for stereo effects. Then I was possibly in such a volatile temper that I decided the incredible: controlling 4 SIDs from a single PIC, which is doing the sound engine of one SID in parallel! Hard to believe that this works without affecting the realtime capabilities too much. I’m really proud that it works without trouble.
However, if you really want 8 SIDs, TK suggests: you could build two 4*SID systems… this will possibly cost you 50 EUR more, but what are 50 EUR compared to my unpayable sparetime
Wrong - you read the MBSID V1 FAQ, and you are mixing MBSID V1 features that have been developed 6 years ago with MBSID V2 features that are the current state. Meanwhile I spent a lot of sparetime to improve *a lot of* things.
However, you are free to read the MBSID V2 manual on my webpage and to write a new Wiki page based on what you learnt, because it seems that nobody felt triggered to do this so far (probably because most people are aware about the V2 users manual)
[text macro]Thats poor community effort btw. - if you don’t like this, go away and search for another project!
If you see the problem and want to help, feel welcomed to improve the wiki![text macro]
