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Everything posted by Rio
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I've readen something in the SID Schematic about 22nF for filter, but i've stuffed the sid like in sid-boardv3: mbhp_sid_v3.gif with 6,8nF. What is correct and what is the difference? Besides, Mike is sending still 6,8nF capacitors for SID boards... I've found that posts: http://www.midibox.org/forum/index.php?topic=9132.0 http://www.midibox.org/forum/index.php?topic=2777.0 I havn't found a real reason or a declaration, why i've to exchange my 6,8nF...but are changes listenable and will be worth the trouble? On the other hand, where i can get this 16x Mylar Radial 0.022uF 100V 2% Polyester Capacitor in germany or does someone have some left in my country or in the near? Greets, Rio.
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if i turn up the volume without routing signals through both filter and without activating a LFO, i can listen to 2 types of sound: - continuous repeating noise (sounds a bit like a railroad ;) ) - and another small hightone sound, which comes and goes sometimes... and sometimes the small notes rises or fall in a ocillation... ..all in very low level, but i'm not sure, if that is normal. The filter is working correct. I've notice, that IMHO the filter will only take effect at CutOff Freq > 1.0V. so i've adjusted C.V. between: 1.0...5.0V for frequency I noticed too, that CEM filter not really match with parameter of SID-Filter. So SID Filter will not take much effect in lowpass-area anymore, because the CEM filter is too low/deep... seems SID filter will be a bit useless vs. CEM, or? Greets Rio.
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ok, after adding 10k trimpots and doing few fine adjusts... (oh that was a bit complicated) i got 0...5V for every AOUT Channel. The Datasheet of CEM3378 was a bit confusing, because i've readen that the frequency should be controlled between -150mV .. 100mV, but the description tells me too, that all inputs can controlled between 0..5V (*confusing*). So i checked both and 0..5V is working for frequency. I've connecting 5V to GAIN, but there was no need to connect 5V to PAN (should be mixed to Channel A = 0V) ok, only 2 little questions: 1. The filter is working fine. I only mentioned that the resonance turns into distortion if i move the resonance knob up to value = 100. Is this normal? (Maybe there is to much gain - i could add a trimpot for Gain too..) 2. If everything is silence, i can listen to some background noise (sweeping noise). Is this normal too? Greets and thx's for much support, Rio.
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ok i'll only connect 5V at Gain and PAN and pray that them working...
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ok you mean i should directly connect 5V to GAIN1 and PAN1 (GAIN2 and PAN2 too), right? that's something i don't understand, because i've build up by using this schematics: http://synthtech.com/cem/c3378pdf.pdf http://www.st-andrews.ac.uk/~jcgl/Scots_Guide/datasheets/Opamps/072dia.gif there isn't any resistor between TL072 negative input and CEM3378 output.. on the other hand, you said: ...but it's connected to negative input of TL072. so do i need then really a resistor, and if yes, which resistor type/value i've to take? PS:Beside i'll take a look at OPL3 Opamp circuit... Best Greets,Rio.
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yes thats a fact! I havn't bought a 7-pin port and have used a desoldering iron for a damaged C64 board.... Oh man it spends a much off time to do that... the pins are fixed at correct position... so they matched in 7-pin port too.. greets, Rio.
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ok.. only that i get it sure and to clear it up: 1.What should be connected to GAIN1 and GAIN2 and PAN1 and PAN2.. ? At time nothing is connected to GAIN or PAN 2.where should the 10k trimpot added on that CEM3378-PCB? til now, the board (shown above) doesn't work yet. I can't listen to any sound on signal audio out. please understand me...I don't want to experiment, if i'm not sure what i'm doing...
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1) you need an own C64 psu for your mains voltage in your country!...don't use that european 220V!! 2) the bottom pin should be ground, all the other like in description here: http://www.c64-wiki.de/index.php/Netzbuchse (german) - but get sure -> take a measuremeter and check Voltage of pins between ground. but do it with a steady hand. test it only with an "canadian PSU". 3) it's best solution to use the optimized PSU schematic with one psu. 4) best you connect the few parts of C64 optimized psu schematic and connect core to sid board. then check the voltage at IC, without stuffing SIDs. 5) yes you need a DINX. Connect one rotary encoder and connect ground like in description of DINX. Scroll down this site. At bottom you find all necessary documents: http://www.ucapps.de/midibox_sid_manual_hw.html i hope it helps... Greets rio.
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they are never used before... and same type R4. I get only in trouble with R4. I'ven't checked on a real C64...
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i have done a PCB-Layout for 2x CEM Filter... here is a screenshot and the PCB for eagle light (in zip) in appendix. Please take a look what i've maybe forgotten - i've strictly orientated by schematic.. For all other, who read this: I can't give guarantee for any errors. Power connector from left to right: -12V, -5V, GND, 12V Signal Out from left to right: Left, GND, GND, RIGHT Yes i havn't connected trimpots or any signal to "gain" or "pan" and nothing is connected to them. (could that be the reason, that i can't listen to any sound?) CEM3378_handmade.zip CEM3378_handmade.zip
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Request for Comments: change of Ensemble selection in MBSID V2
Rio replied to TK.'s topic in MIDIbox SID
sorry, i haven't used different ensemble to much yet... -
they are completly unused... and both have the same behaviour - only in HP area, i can listen to a bit sound.
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ok, i'm able to control the AOUT_LC Voltage from SID Application Res and Cutoff endcoders, but how can i adjust the trimmer correct for AOUT_LC module? What should be adjusted first - the gain or the offset - and which values should be set? (I'm not really sure, i think they all work between 2,8V...8,xV at time - they are all standing in middle position). i've connected the CEM Filter Board to the AOUT_LCs, like in schematic of CEM3378... ... but at time i can't hear any sound. It seems that the power voltage is correct on every IC socket. What could be the reason, that i don't hear anything? The "Gain"- and the "PAN"-Input are not connected and opened. ...is that really be necessary or would be nothing heard, if i let them opened? Which type of trimpots you use (10kOhm ok)? Greets Rio.
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Request for Comments: change of Ensemble selection in MBSID V2
Rio replied to TK.'s topic in MIDIbox SID
IMHO: Ensembles should only be changed by up/down buttons.... (I deadjust continuous the ensemble because of using menu encoder for other purpose!..) Greets Rio. -
Are we able to clone or does it makes sence, if different setups (6581 / 8580 + AOUT_LC) are used? Does someone have an idea, why my 'both' 6581R4 are soundless while activating filter? Best Regards, Rio.
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@tk: I've the SID V2 application running on a second device with a 2x16 LCD (So i switched in mode 4 in asm). The problem is following: 1. if i rotate the "depth" encoder of LFO, it will not shown on Display (the LCD switched not to the correct visual position). 2. the main menu shows a ">" on the right side. But i can't choose the menu options because the "menu" encoder will change the "ensemble". 3. Filter: ------ Why 6581 SIDs are pre-defined in asm from 000 to 600? Hiigher values than 600, will change the filter too, at my 6581R3 and normal 6581 SIDs and gives more range for LFOs... 4. Filter 6581R4: --------------- if i use 2x 6581R4 SIDs, instead 2xR3 -> nothing will be heard on same SID boards, if i activate Low- and bandpass for both sids. only in HP area some noises are noticable.. Is there a reason for that behaviour? Someone notices the same? 5. Volume --------- is it possible to give the volume more range? If i activate them with LFo, i only notice very small changes (independent from sid type)
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mhh...sounds a bit complicated, but i've to check out..
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great application.. i'd checked out the box last weekend. I've only a question to the matrix (for easier work): it's possible to pre-selected the assigned EG or LFO, while pushing the horizontal buttons of the matrix (like in old application)? so that i've a direct access to current activated option.
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Yes it's shown correctly!! ;) What is new/changed in RC5? How do i got the application simple cloned to the others pic's?
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i can, but only at evening.... i'm on work yet. Best Regards, Rio and thx for fast support.
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ok, i'll try it. i've to try it... but i won't damage anything... anodes are at SR7, Cathodes are at SR8 ... like in definition and for MBSIDV1! I only added the last cathode-line for MOD VOL. Everything should connected correct like in MBSIDV1...nothing special.. if i swap SR7 -> SR8 and SR8 -> SR7 all LED will be shown red... mbsid_dout_default.pdf (similar to MBSIDV1)
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The last 2 days i have upgraded my old midibox SID 1 to 2.. (MBSID2 beta 11) First, I say thank you very much for this huge work and nice application!! While testing i notice some problems (but my wires seems connected correct): 1. DINX -> SR 10 connections (SR > 9) will not be recognice for my setup (e.g. METER Switchbutton is set up to SR10, 0 (i've recompiled the asm and uploaded - the button doesn't react. Then i have tested SR11, 0 in asm and i've sticked the Cable to SR11... but it doesn't work too. Then i checked a button < SR 10 and that works for testings) 2. DOUT-Matrix is shown selected LEDs in mirrored position. If i press the right matrix-buttons, then the correct horizontal select-line will be shown... if i press the bottom matrix-buttons, then the second correct vertical select-line will be shown (both to a reticule). But then the selected LED will not be in the middle of the reticule, but in another postion---> because the selection for an option (like L1, L2, L3) will not be shown in a vertical selection - but instead of horizontal selection in matrix (active LED mirrowed diagonal in 8x8 field - that must be wrong!) The effect is the same for VU-Meter. The VU-Meter works horizontal, instead of vertical. Greets Rio.
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Hi Thorsten, So, i don't need to change any connection to SID like i've used before...? you mean PIC18F4685 will always work in 4bit mode? I havn't tried it yet ;) Thxs for fast reply... Greets, Rio.
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I'm ready to upgrade to MBSIDV2 and i want connect 2xSID to 1Core and 2x seperate SIDs to 2xCores. i have readen the upgrade hints here: http://www.ucapps.de/midibox_sid_manual_up.html ok, but i own older SID-Boards (V2) and Core-Boards (V2) and i've still yet connected the boards like in this description: http://www.ucapps.de/mbhp_sid_old.html and here is my question: 1. I see in mbhp_8xsid_c64_psu_optimized.pdf (for stereo_sids) MD is connected to MD of both SID_L and SID_R. But in my old connection MD is connected to SC!! (the purple line). Should it be still connected to SC of SIDboardV2? Should then the second sidboard connected from MD --> SC too? Additional, should i connect MD from core to MD of both SIDs too, like describted in new hardware. 2. PWM line is the clock for SIDs, i'm right? I've connected the SID module from Core::J7:SO/PIC Pin #17 (like in description of mbhp_sid_old.html) So, i don't need to connect PWM line in my hardware, i'm right? 3. If i wanna upload new MIOS Version 1.9f and upload new SID application - should i connect the 4bit LCD connection before or better after the new mios uploaded? a)Does the new MIOS automatic recognize in which mode my LCD is connected (does LCD will show READY in both modes too)? b)Does the new SID-Application automatic recognize in which mode my LCD is connected or do i have set it up by a flag in code? 4. I've expanded the Matrix to 8x8. I've oriented on description of wilba's document. I've connected the (-) volume line to the 8th bridge of J6 in DOUTX. But the DIN description doesn't match with TK's DINX description, so i don't no where i should connect the button for volume of matrix. I think, the connection must be on the 3rd DINX board, maybe J3 (?) - but on which position? I would be glad for an explanation.. Best Greets, Rio. PS: i hope my descriptions wasn't to complicated...