Rude Mechanical Posted June 14, 2011 Report Share Posted June 14, 2011 G'day guys, I'm using the regulated 12V power supply from Jaycar electronics that was recommended to me by Wilba, part number is MP3242. When voltage testing, I got 5.02V, 9.03V, and 12.31V. Given that the instructions keep saying 'exactly 12V' and I've got a pair of 6581 chips, I'm more than a little concerned. I got these because I prefer the filter on them; I'd hate to have to on-sell them and get a couple of later models. Any suggestions you have will be much appreciated! Chris Quote Link to comment Share on other sites More sharing options...
julienvoirin Posted June 14, 2011 Report Share Posted June 14, 2011 did you mesure with load ? Just verify its DC ; but for me 12,3V is OK as i've have supplied 8580 with 12V and they did not fried ! It would have been easier to follow the regular stuff with voltage regulators Quote Link to comment Share on other sites More sharing options...
Rude Mechanical Posted June 14, 2011 Author Report Share Posted June 14, 2011 (edited) Thanks for the quick response :) I measured again, the multi-meter is definitely set to DC and with every IC except the SIDs in place, it's still measuring high. 12.38 actually, now I check again. c- Edited June 14, 2011 by Rude Mechanical Quote Link to comment Share on other sites More sharing options...
nILS Posted June 18, 2011 Report Share Posted June 18, 2011 12.31V is within the tolerances (that's <3% off). Quote Link to comment Share on other sites More sharing options...
Rude Mechanical Posted June 20, 2011 Author Report Share Posted June 20, 2011 Sweet - well, I'll report on my progress after tonight :) c- Quote Link to comment Share on other sites More sharing options...
Rude Mechanical Posted June 20, 2011 Author Report Share Posted June 20, 2011 Okay, at least one SID is working fine. I believe the other is running very quietly, and not getting any Note Off signals. That is, if I press a C3 note using the default Lead patch, I get one loud signal until I let go of the key. Then I get a much quieter signal with infinite sustain - when I press another note, it triggers okay, but the same behaviour follows. I've done a bit of a search, but nobody else has reported the same thing. The default patch bank has failed to load in properly, so I'll try to upload it via MIDIox instead and see if that makes any difference. c- Quote Link to comment Share on other sites More sharing options...
Imp Posted June 20, 2011 Report Share Posted June 20, 2011 The quiet sound is the ADSR-bug. The envelope can't silence the oscs completely, so the last note played quietly goes on until the next is played. That's normal. Quote Link to comment Share on other sites More sharing options...
Rude Mechanical Posted June 20, 2011 Author Report Share Posted June 20, 2011 Normal? Ack. Still, not too big a worry - I'm planning on getting a decent multi-fx to run after the sammichSID; any box worth the money should have a decent noise gate in the signal chain. On the plus side, that means that aside from uploading the presets again & doing the final assembly & painting, IT'S ALIVE :) c- Quote Link to comment Share on other sites More sharing options...
Imp Posted June 20, 2011 Report Share Posted June 20, 2011 Nice! Btw, there is a workaround for this bug in the firmware. You just need to activate it. Quote Link to comment Share on other sites More sharing options...
julienvoirin Posted June 20, 2011 Report Share Posted June 20, 2011 moreover there is a test_tone app to test (ahaha) that the SIDs are OK and the circuit too : it output a 1KHz signal (square wave ?) Quote Link to comment Share on other sites More sharing options...
Rude Mechanical Posted June 20, 2011 Author Report Share Posted June 20, 2011 Good to know - a quick perusal of the common desktop multi-fx failed to bring up anything with a noise gate! Sorry to request spoon-feeding, but can somebody provide me with the links to the fix & the test-tone? I've had a dig through the FAQ and manual links but can't see any reference to the fix (perhaps they need to be updated?). cheers c- Quote Link to comment Share on other sites More sharing options...
julienvoirin Posted June 21, 2011 Report Share Posted June 21, 2011 http://uCApps.de/mios/mbsid_testtone_v3c.zip mios8 download section Quote Link to comment Share on other sites More sharing options...
Imp Posted June 21, 2011 Report Share Posted June 21, 2011 The workaround is located in the "CFG" submenu of the Lead-Engine. It'S called "ABW". You can read about it under "Configuration" of the manual Quote Link to comment Share on other sites More sharing options...
Rude Mechanical Posted June 21, 2011 Author Report Share Posted June 21, 2011 Thanks to both! So the ABW renders the SID useless for live playing, hey? Do the later SID chips have the same issue? If so, I'm definitely just going the external noise gate option - I bought this to use Taurus style with some MIDI pedals :) c- Quote Link to comment Share on other sites More sharing options...
nILS Posted June 21, 2011 Report Share Posted June 21, 2011 Yes, all SIDs have the ADSR bug. Quote Link to comment Share on other sites More sharing options...
Hawkeye Posted June 21, 2011 Report Share Posted June 21, 2011 (edited) i actually embrace this feature... it adds to the noisy "chip" style and otoh your sids never should be silent for long anyways :D Edited June 21, 2011 by Hawkeye Quote Link to comment Share on other sites More sharing options...
Rude Mechanical Posted June 23, 2011 Author Report Share Posted June 23, 2011 Thanks all, I'm on to the final painting and assembly now :) c- Quote Link to comment Share on other sites More sharing options...
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