easy_john wrote:

No, they focused only on local market. Here's a great amount of bureaucracy, if you want to send something abroad, as a legal entity.
So create something in Russia and sell abroad - is almost impossible.

Aww, such a shame 🙁 Considered having the prototypes for my GUS clone project done there.

I could do all necessary logistics if you want. But as I'm not an expert in PCB ordering issues, I'd need some help from fagear, if he could do that.

I can do that. I think we can talk about it in PM.

Awesome - I'll get back to you once the project reaches prototyping then 😀

j^aws wrote:

Fagear wrote:

I didn't find 470pF film caps yet, I'll try to replace those with 470pF and test again.

Let us know how you get on with the testing

Finally 470pF caps arrived.
In tracks with use of filter difference is audible.
And probably my "new" 6581 (R2) is also somewhat defective. Because that's how it sounds on "Castlevania_64_Mixes.sid" with 470pF caps - not healthy. Eh, whatever, at least filter works in some way, but sometimes filtered sound is a little deaf (not always).

That's how 1nF (SSI-2001 default value) compared to 470pF (C64 default value for 6581):
Blackmail_Tune_1.sid: [6581R2 1nF filter caps] [6581R2 470pF filter caps] [8580R5 22nF filter caps]
Rambo_3.sid: [6581R2 1nF filter caps] [6581R2 470pF filter caps] [8580R5 22nF filter caps]
Ruzzians.sid: [6581R2 1nF filter caps] [6581R2 470pF filter caps] [8580R5 22nF filter caps]

Blackmail_Tune_1.sid: compare from 1:44 - listen for the bass line and snare. Very deaf with 1nF caps, a little crisper with 470pF. But far from 8580R5 with 22nF, probably because my 6581R2 is not functioning properly.
Rambo_3.sid: compare from 0:49 - listen for the bass line once again (it's filtered). Crisper with 470pF caps, sound very close to 8580R5.
Ruzzians.sid: compare from 1:56 - with 1nF bass line is distorted, clipping. With 470pF a little better, but still very deaf. Both variants far from 8580R5.

And some more audio!
Pseudo-stereo, left channel is 6581R2 with 470pF, right channel is 8580R5 with 22nF:
Coma_Light_IX_n_a_bit_part_2.sid
Eternal-Funk_Remix.sid
Experience_2_tune_1.sid
Waiting.sid
Zardax_One.sid

6581R2 is more smooth and "bassy", but filter sometimes goes too low (deaf and quiet sound). 8580R5 is more ruff, crisper and has less bass.

Some more comparison, graphical this time.
Spectrogram time!
Lowpass filter on my 6581R2 sometimes goes too low:

Sometimes filter acts as 8580R5's one (green marks):

Sometimes cutoff frequency is almost right, but filter curve is not the same:

And some more (look for yourself):

Some very nice analysis there Fagear.

I've picked up a second SID, 6581R4, which has a matching Commodore insignia to complement my 8580R5. I'll be trying some tests later with both installed together.

I'm especially interested in which version of the 6581Rx would give me the best pseudo-stereo effect, alongside the 8580R5. Maybe I can just modify the filter on the 6581R4 instead, rather than try different versions of 6581Rx... Hmm, lots of things to try...

I've got new SIDs! 😎

Every SID works excellent.

All SIDs I have for the moment (including mine and dead/killed):

While bristlehog still struggles to find some free time, maybe we have to contact with any authors of existing software? I mean those SID-players that also allow playback via HardSID. I think it will be not difficult to implement slightly different data output method for SSI-2001 compability. 😕

I could try contacting the folks from hard software (or rather write a post on the pouet.net demoscene hangout BBS) and ask them if they still have their sourcecodes.

I have a question, how do I orient those long yellow components? 😀

[Edit]

Done a little soldering today. Because the default jacks were very crappy and placed too much force on the jack I took some off an FM806 card that doesn't work correctly. I will also install film caps such as in the deluxe version. I'm loving it so far , really fun 😁

Stojke wrote:

I have a question, how do I orient those long yellow components? 😀

Look for first contact mark on the board (triangle on the silkscreen, square pad) and on the resistor network (dot above 1st pin).

I thought it was something like that with the square pad. Thanks 😁

Are the blue caps any better than the yellow ones?

Stojke wrote:

Are the blue caps any better than the yellow ones?

I don't know. I think there is no difference.
I've just re-used some capacitors from old prototype just because I didn't want to spend more parts needed for ordered boards.
Simple ceramic caps.

Cool. I think my card is ready for audio parts now.

I will buy the additional parts I will need, including precision resistors for analogue audio part and film capacitors you mentioned. I still haven decided on the SID chip type so I left those parts unaltered.

As you said, 10uF 16V Film caps are pretty hard to find, so I will order the caps online VIA Sprint Electronics Novi Sad.
I have bought the missing connectors and resistors that weren't included and soldered them on. I learned that they had those higher quality sockets as well (the one you used on Deluxe version at 6581/8580) but its too late now.

Should I order 100nF values for film caps as written on the board (100nf x3, 10nf x1, 10uf x1), or can I use 220nF you used? Do I need to recalibrate if I use 220nF (just like I would need to if I used 470nF)?

Stojke wrote:

can I use 220nF you used?

Yes you can.

Stojke wrote:

Do I need to recalibrate if I use 220nF?

Nope. No any calibration needed.

Looks like we have a scalper ... and wow, amibay turns out the reputation it had for me was not bad enough.

http://www.amibay.com/showthread.php?73579-PC … ore-SID-replica

shock__ wrote:

Looks like we have a scalper ... and wow, amibay turns out the reputation it had for me was not bad enough.
http://www.amibay.com/showthread.php?73579-PC … ore-SID-replica

What a problem with you?

Asking for 3x the price you paid on a project I started and worked on ... yeah, people profiteering off the work me, Fagear, bristlehog and Codekiller put into it was our main intention.
Especially when offering the project at virtually no money earned - yet a decent bit of expenses.

Quite disrespectful - yet your perfect right to do so.