Hi, just finished my samich sid, its going well so far… though I notice scrolling through some of the presets some are loud and some a really quiet?
Is this normal?
Hi,
I don’t think so. The volume of the presets I use is set to 127. They are all loud 
Cheers
orange
Triangle waveforms don’t sound as loud as others. Also patches using the filter might not be as ones not using the filter. Maybe your filter is sounding mushy or not working well? Identify which patches sound less loud, try turning off the filter, etc. Or if you want, upload some wavs of the same note played in some patches which you call loud and which you call quiet (and don’t touch the recording level in between recording those patches)… then we can compare with other MIDIbox SIDs.
Hey guys,
thanks for your replies!
My sound card is in getting fixed at the moment, I should have it back on Friday, I will do a recording then.
Below are patches that are super quiet compared with others, if other patches are at a normal level these (below) are almost silent?
when I first loaded the patch bank only every second one loaded, I reloaded and have the full 127 vintage pack installed.
1st patch
6 simple saw
7 simple pulse
8 puls w/o body
9 popcorn
10 flute
11 synth plug
14 sync sound (starts quiet then gets louder)
18 arpeggio
19 arpeggio 2
31 metal
47 wt falling
56 dont cry baby!
62 step by step
68 seq vintage a
92 monty bass1
95 monty lead1
93 monty lead3
103 sample and hold 1
123 crescendo
Look forward to hearing your thoughts.
cheers
B
+1 on Wilbas proposal regarding the filter test - please turn it off in one or more of the affected patches, to see, if it makes a difference (and the filters are damaged).
Assuming, that your SID filters are not 7-feet-under, this could also be an explanation:
I once reconfigured the filter mode (calibration?) from 6581 to 8580 in an ensemble and wondered, why many patches went silent (low pass filter) - turning that fine cutoff knob resolved the problem in a second :-).
Greets,
Peter
When you say turn off filter, do I go into the ensemble, click filter and set values to min 000 and max 000?
I am still a little new to the interface…
Cheers
You go to the "FIL"ter menu (click the second button under the display, then click on FIL) and remove the assignments to the SID channels 123, so that the value under CHN looks like “—”.
For the second test, change the cutoff to a higher value (“CUT” -> “FFF”) or to a lower value (“CUT” -> “000”). If at some point the volume comes in as in the other, normal loud patches, your filters are ok, but the patches have the wrong cutoff values.
Greets,
Peter
Yep filter prob… where to from here?
Thanks Peter!
Please perform test 2 -> read my edited posting above.
Of course, you should hear “filtering”, e.g. with a low-pass filter, there should be a significant cut-off in the high frequency sounds.
If that does not work neither for the right nor the left SID, both SIDs may have damaged filters (although I think that is unlikely).
Test two failed… no noticeable change in sound. Do I leave the CHN value to “—”?
:sad:
You need to activate them again, of course - CHN 123 (Activate Filter on all SID channels) - MOD L-- (Lowpass), then sweep the Cutoff from 000-FFF, while playing some notes, to see, if there is some filtering going on.
Greets,
Peter
No luck :hmm: no filter :sad:
Which types of SIDs are you using (6581 or 8580/6582)?
If you can obtain some replacement SIDs, you could exchange them for a test.
I don´t know, if anything else on the hardware side could effect the availability of the filters, e.g. wrong filter caps? Some moar feedback from someone else is needed
Greets,
Peter
The 1st patch is probably still the “Init” (default) patch, which shouldn’t be quiet.
Possibly you have Osc 1 quieter than the others.
Try initializing the 1st patch again (via the Shift menu)
Then compare the volume when playing each Osc with the same settings.
i.e. goto Osc menu, set Osc 1 to off, set Osc 2 to Pulse. Repeat with Osc 2 off, Osc 3 Pulse.
This is just a theory. Perhaps there is some hardware problem too. Check the filter caps are correct for the SID type and installed correctly.
Also, if you have two SIDs, is this problem only happening on one SID or both?
Hey guys thanks for replies and help!
Had a big day at the office, and tomorrow looks to be another 15 hr day… I will check out the given tests tomorrow night.
I have two X 6582a’s installed, pretty sure I got the correct filter caps installed, they are on 1st 3rd & 5th I think… will check it out though.
Both sids seem to make the same quite sound… the sids were handled with anti static gloves and I wore a antistatic wrist band while installing, they were stored in antistatic bag in a anti static box in there plastic anti static sleeve etc before use… don’t know if this helps?
I will trouble shoot tomorrow night and get back to you guys.
Thanks again!
:flowers:
Cheers
B
Osc test failed…
capacitors are 22nF installed on 1st, 3rd, 4th and 6th holes, would the hole number matter?
cheers
Hole numbers matter. 1st and 2nd pins are connected. 5th and 6th pins are connected. So you can use capacitors with 0.1" or 0.2" lead spacing.
It makes more sense if you look at the PCB: http://www.mb6582.org/sammichSID/sammichSID_Base_PCB.pdf
I should have just put photos in the build guide with photos of the two possible ways of plugging in caps.
Hey mate, thanks again for your help! I tried the different hole spacing with the same results, think I might need to buy some more capacitors now… they look a bit crap after my sausage fingers mangling them LOL.
thanks for the schematics!
I’m going to jump into the thread. I’m experiencing the exact same issue. I failed the filter test, and in the osc test i get sound from all the waveforms but saw, traingle and pulse.
Hi all…I haven’t had a chance to open up the sammich and try to diagnose the problem. But this might be a clue. This morning, I ran it through a guitar pre-amp and found that all of the quiet patches are now at normal volume.
However, the poly patches and drum sequence patches only play half the voices. Any thoughts about this?