Beegle wrote:Total shipping time from Russia to Canada was 10 days. I'm super impressed!
As am I. 😲
Beegle wrote:I did a silent (and slow) unboxing and assembling video (SID, bracket) of the card, if someone wants to see
Good video, thanks!
Beegle wrote:Success! It worked flawlessly with Ultima VI.
carlostex wrote:My 6581 SID arrived from Canada. So i put it in the card and it work great! Tested with Ultima VI and Bad Blood.
You better check your SIDs with some hm... *.SIDs. Because I think I've discovered that my MOS6581R4 has defective filter... 😢 Read below for details...
Some news here.
I've got 8 * 8580R5 from shock__, every SID is tested and works great:
1988_Top_40_MEGAMIX.sid
Acid Jazz.sid
Airwolf_Mix.sid
Blackmail_Tune_1.sid
Castlevania_64_Mixes.sid
No_Good.sid
Peanut_Pleasure.sid
Rambo_3.sid
Ruzzians.sid
Zybex.sid
All *.SIDs were played with old alfa-version software from bristlehog (SIDTEST1) on a PC with AMD K6-2 533 MHz. This CPU was not enough for the task, so the speed is a little bit slower than it should be. My K6 refused to work @550MHz. 🤣
And I've found something interesting...
I've noted previously that SIDTEST1 was buggy on some files: sometimes not all voices worked or volume was lower than should be (and even was jumping back and forth). And what do you think... with new 8580 everything works normally! Every *.SID plays back as it should: volume is ok and voices are in place.
This leads me to some bad thoughts... I don't think that emulator code used in SIDTEST1 is IC-dependent to produce such a difference. More likely it is a bad filter circuitry in 6581R4 that I have (and I think bristlehog's SID is defective in the same way). Filter is used in music?.. Here comes trouble! Volume jumps, voices disappear.
Ruzzians.sid: [6581 (defective?)] vs. [8580]
No_Good.sid: [6581 (defective?)] vs. [8580]
Zybex.sid: [6581 (defective?)] vs. [8580]
Please note that 6581 was playing on a PC with CPU @866MHz, but 8580 was playing on a PC with CPU @533MHz. Almost two times slower. Sorry for the inconvenience.
Ruzzians.sid: from the start there is bass sound with floating high-pass filter (@8580). 6581 outputs nothing. After that bass line is probably uses filter again, so we have insane volume jumps according to bass notes. In the middle of the *.SID there is floating filter on 8580 once again, but 6581 plays back almost silent and no evidence of filtered sound.
No_Good.sid: almost the same, from the start 6581 outputs only two voices, 8580 outputs three and the third one is bass line with floating filter. In the middle of *.SID volume on 6581 is jumping a little, 8580 plays back fine.
Zybex.sid: the same. Bass line on the 6581 is not present at all (that leads to silence in the middle of the melody), 8580 has the bass line and filter works on it like it should.
Those damaged SIDs are well-known already and the most common malfunction - not working filter circuitry.
Also I have to note that power supply noise pickup is noticeable... Accessing HDD, loading CPU leads to some audible sound effects, when SID is not playing. And it seems like with 8580 this noise is a little bit stronger. 😢
Well, this is inherit from original board, there is not much difference from original board in power supply circuitry. I think there will be next SID-based project, SSI-2001 compatible. 🤣
And I've noticed that software emulation in foobar2k (based on ReSIDfp) sounds not as good as real hardware 8580. Sometimes it plainly muddles some voices and overall sound is messy. Real 8580 sounds crisper and brighter. 😀