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Frodigi 8 by Algotech
screenshot added by algorithm on 2017-01-24 01:26:34
platform :
type :
release date : january 2017
  • 16
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popularity : 56%
  • 0.62
alltime top: #7815
added on the 2017-01-24 01:26:34 by algorithm algorithm

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Should autodetect sid type. Results may vary quite a bit on old sid.

For Digimax mode (Make sure it is set to $de00) Hold down space while booting. All production note texts included in the demo.
added on the 2017-01-24 01:26:46 by algorithm algorithm
the sound quality is actually pretty decent and bearable this time.
rulez added on the 2017-01-24 09:44:11 by visy visy
I profoundly appreciate the amount of work and research put into this project.
rulez added on the 2017-01-24 15:59:56 by utz utz
somehow i wanna thumb this down because it is a boring tech show - again. and what utz said. this would be so much more impressive used and presented in a demo or intro and with a nice .nfo with release notes. yeah, well, that's just, like, my opinion man. oink.
Amazing quality for almost 5 minutes of music.
rulez added on the 2017-01-24 19:24:51 by Buckethead Buckethead
Good sound quality but incredibly boring as demo.
added on the 2017-01-24 19:27:16 by StingRay StingRay
The transient detection does the trick! Really astonishing result, especially on the vocals! great one!
rulez added on the 2017-01-24 19:35:15 by mad mad
Respect again!
rulez added on the 2017-01-24 19:40:25 by frog frog
Can you make this work on OPL chips which can do the mixing for you? Or do the sine partials have to be sample-accurately synced and in correct phase?
rulez added on the 2017-01-24 22:01:46 by yzi yzi
Yzi. There is no phase information in the encoded file. As long as sustain can be controlled per channel, its not an issue at all (provided that you have individual frequency control per channel as well)
added on the 2017-01-24 22:16:12 by algorithm algorithm
What visy said.
rulez added on the 2017-01-25 11:52:23 by BackSpace BackSpace
please put Tom's Diner in Frodigi 9 so we can compare :)
added on the 2017-01-25 12:11:33 by Preacher Preacher
I need to try this on my c-128. The Youtube link is dumb...says I cant view it because it is says this video contains content from muyap. Poo on Muyap...I don't even know what that is.
rulez added on the 2017-01-25 15:59:12 by tonyrocks tonyrocks
That sound quality :)
rulez added on the 2017-01-25 16:53:43 by Emod Emod
5200 Hz sampling rate :)? Honestly sounds more like 1 kHz or something, or maybe it's the crazy aliasing messing with my hearing. Kinda cool tech but ultimately not that interesting because the perf requirements and quality don't seem to make this useful for anything.
added on the 2017-01-25 17:01:57 by noby noby
What noby said.
added on the 2017-01-25 17:35:20 by Kylearan Kylearan
Seconding Preacher here.
Tom's Diner with these routines!
added on the 2017-01-25 19:13:54 by leGend leGend
Few notes as below (also this is in the actual demo text, doesnt anyone read first before commenting?? and yes, i know the quality is not good (although would be hard pressed to even consider a lossless sample at 5200 good either). (if you want crystal clear, listen to my ssdpcm-mp method on SSDPCM-MP amiga demo, or Algodreams ssdpcm-mp part)

Excerpt from the demo itself..

"Q: why is the quality so horrible? a: this is ultra low bitrate and only uses 8 sines to recreate the whole audio. whole concept of the frodigi series is to attempt to pack audio at an extremely small size and then to gradually increase the quality with each series while still maintaining similar data size. quality is also fully dependant on source audio. speech can sound quite decent, but having chords, drums and other instruments together with the speech is more of a task with just the limited amount of sine channels. "

Some other notes..

In order to have the 8 channel mixing with screen on and streaming and semi depacking, many shortcuts needed to be done on the c64 side which in turn results in even worse quality (pitch adjustment method, non interpolation etc). Still as an exercise, encode a mp3 file at 8kbs or so and compare with this 4kbs implementation? (Not sure if mp3 can go any lower than 8kbs) Again, this is not meant as a demo, but more as a proof of concept.

The PC encoder for non-c64 use produces far higher quality at the same bitrate (4kbs or lower down to 1kbs). on the c64 side however, 5200hz for 8 channels leaving some cpu time and screen on for loader and some other accompanying text-displayers. (much higher is possible if screen is off and the main decode is in closed loop) but that somewhat limits things further.
added on the 2017-01-25 19:27:07 by algorithm algorithm
ah, and one more thing. speech.. This encoder is not aimed at speech only. There are far more efficient methods of packing speech only based data than this one (even if it seems to do an ok job at it)
added on the 2017-01-25 19:28:50 by algorithm algorithm
First example of this technique that sounds decent, so approximately how much of the CPU is left to do other stuff(excluding loader, any other effect in this demo)?
rulez added on the 2017-01-25 20:22:45 by Nitro/Black Sun Nitro/Black Sun
around 15-20% of cpu time left (but for slightly worse audio) with carry errors in the mixing (lower bits affected) it would save me an extra 40 rasterlines or so. giving around 25-30% free.
I needed that remaining rastertime to stream the data from disk (although the loader did a good job and was finished way before the next segment was needed
added on the 2017-01-25 20:27:43 by algorithm algorithm
very nice result!
rulez added on the 2017-01-25 20:29:03 by roudoudou roudoudou
Crazy tech show.
rulez added on the 2017-01-26 00:14:39 by JAC! JAC!
I just get some kind of copyright complaint on the youtube page (content from muyap) :(

Anyway it is very interesting with non mainstream sound compression!
added on the 2017-01-26 06:06:27 by rloaderro rloaderro
Great tech show!! :)
rulez added on the 2017-01-26 09:59:03 by Sir_Lucas Sir_Lucas
What a great project. Impressive result, congrats ! :)
rulez added on the 2017-01-27 14:39:01 by norecess norecess
no nudes for once, impressive
added on the 2017-01-27 15:10:04 by elkmoose elkmoose
"This video contains content from Muyap. It is not available in your country.
Sorry about that."

http://polsy.org.uk/stuff/ytrestrict.cgi?ytid=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DXc5Cl8G9S2E shows five countries not allowed. Why? :(
added on the 2017-01-28 02:45:17 by AntDude AntDude
rulez added on the 2017-02-17 18:48:55 by gentleman gentleman

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