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The Brothers Gonna Wr4k It Out (old CIA edition)   [2019]

The Brothers Gonna Wr4k It Out (old CIA edition) Released by :

Release Date :
15 June 2019

Type :
C64 4K Intro

User rating:awaiting 8 votes (3 left)   See votestatistics

Credits :
Code .... ChristopherJam
Graphics .... ChristopherJam
Sampling .... ChristopherJam

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User Comment
Submitted by Krill on 18 June 2019
While i appreciate all the compression effort, i'd still like to listen to something that actually sounds good, no matter the compression ratio. ;)

Also i have this hunch that nobody ever really pulled _all_ the tricks in the book for maximum sample replay quality on C-64. Like, taking all the SID non-linearities into account, applying proper resampling and noise shaping, using the full 12-bit DAC range, what have you. =)

As for this release, still need to throw this one and the other at a real C-64 (and find one with old CIA, which is the hard part) before casting votes... =D
User Comment
Submitted by ChristopherJam on 18 June 2019
Thanks, Wacek!

And yes, realtime definitely allows more possibilities, nice work on Acid. I mostly switched to pre-rendering for this one because I wanted to demonstrate >11KHz playback with the screen on, so I didn't have as many cycles available for decrunch as I did for Wir sind die Nacht.

Interesting comparison graph there; I definitely get a much muddier sound from 18:1 compression than you do from 8.x:1. I never did manage to get rid of those spikes at harmonics of my block frequency either, which I suspect are a side effect of only having 16 different delta blocks as much as anything.

This one would have sounded a little better at 16:1 than at 18:1, but I had to increase the number of deltas per palette entry from 8 to 9 when I ran out of space for code and graphics for the length of the sample that had clawed its way into my brain.

I think I'll be dropping back to 7.8KHz for any future "screen on" efforts; at this end of the compression spectrum bits per second is probably a more useful metric than playback freqency anyway (5.5kbps for this, 11.9kbps for Wir sind die Nacht (including palette overhead in each case), or 5.2/10.4 just for the index streams).

Looking forward to seeing what you do next!
User Comment
Submitted by wacek on 17 June 2019
Nice effort! I'm so glad you picked up the challenge. And may I say, Let's Get Brute'al might not be the last from me on the subject ;)

You might have already noticed I improved on my original routine in Acid Flashback, moving it from pre-rendering to realtime, which gives many new possibilities, which will be explored in the future ;)

Also, I cannot help myself to compare our routines a little bit. Yours definately gives a better ratio, but as you can see on below graph, mine gives much better frequency response at lower sample rate! So overall better quality in my ears...
User Comment
Submitted by ChristopherJam on 15 June 2019
No ROM usage in this one - it's more the price of me being greedy and using a sample more than twice as long as the one Arise used :)

Thanks for the props for source selection.
User Comment
Submitted by Jammer on 15 June 2019
Big thumb up for material choice alone! Samples are slightly garbled but I know it's a price of using ROM :D
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