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C64MP3   [2010]

C64MP3 Released by :

Release Date :
6 February 2010

Type :
C64 One-File Demo

Released At :
Datastorm 2010

Achievements :
C64 Demo Competition at Datastorm 2010 :  #4

User rating:*********_  8.7/10 (30 votes)   See votestatistics
*********_  9.1/10 (13 votes) - Public votes only.

Credits :
Code .... Mahoney of Visa Röster

Download :

Look for downloads on external sites:

User Comment
Submitted by Mr. Mouse on 11 March 2010
Awesome effort, with acceptable sound.
User Comment
Submitted by booker on 17 February 2010
User Comment
Submitted by robozz on 17 February 2010
What would be the chance that this demo is released at the same day (and almost within the same hour as far as I can tell) as Swedish TV broadcasting a documentary of the song...

more than a coincidence, I wonder?? :)
User Comment
Submitted by booker on 16 February 2010
.sid please!

User Comment
Submitted by Krill on 14 February 2010
Great stuff, really used all the tricks in the book.. :)

Although a somewhat misleading name, given that it's not at all MP3, and feasible for voice samples only.
User Comment
Submitted by Data on 13 February 2010
"i wonder about using mp3/ogg decompression for ingame sound effects ;) which format is more cpu consuming while decompressing?"

ogg (Vorbis) has greater lust for CPU resources than mp3.
User Comment
Submitted by madcrow on 12 February 2010
Insanely cool. The one thing I would suggest would be to pick a new name. Otherwise some dumb person on the Internet might mistake this for an decoder for MP3-format sound files on C64, rather than a custom sound encoding system.

Still, I'm looking forward to new songs encoded in this format. I'd make some myself, but my PC isn't powerful enough to run the encoder!
User Comment
Submitted by Jammer on 12 February 2010
i wonder about using mp3/ogg decompression for ingame sound effects ;) which format is more cpu consuming while decompressing?
User Comment
Submitted by Testa on 12 February 2010
wauuw. very impressive stuff.. i didn't know it was possible to compress and play such a large sample... respect!
User Comment
Submitted by PAL on 10 February 2010
A friend of mine that are a web banner designer thought this were too low sound quality, but after I explained what the c64 really is he were like... hmm... I challenged him in doing a banner in flash in 320x200 with sound in 64k ram, even that is more than one can use... he said OK I will do it... the day after he called me up and said he thought it were really impressive that thing on the c64 as he had tried to do a low kilobyte of the song and he did not wanna say how much the mp3 file landed on, but he could say that he were not able to hear what were said and that the file was still massive compared to 64k filezise... ha ha... c64 nerds for the win!
User Comment
Submitted by McMeatLoaf on 10 February 2010
What?! An entire 2-minute song sampled and crammed into this demo?! This is just... awesome!
User Comment
Submitted by Sasq on 9 February 2010
This is just insanely cool. I wouldn't mind hearing some history, how Mahoney came up with the technique and how long it took to develop etc...
User Comment
Submitted by ne7 on 8 February 2010
frankly rocked my socks off at the party :)
User Comment
Submitted by Frantic on 8 February 2010
So now Visa Röster will start making real sids? ;)

By the way.. What is the exact reason that resid emulation fails so hard on this program? Is it because waveform 0 is not emulated in resid?
User Comment
Submitted by NecroPolo on 8 February 2010

Almost as cool as your Biggles remix ;)

Respect + congrats!
User Comment
Submitted by meltingpot667 on 8 February 2010
@Irwin & Edhellon:
My further guess would be, because Suzanne Vega is sort of considered to be the mother of MP3 in any case.

From Wikipedia entry on MP3:

Karlheinz Brandenburg used a CD recording of Suzanne Vega's song "Tom's Diner" to assess and refine the MP3 compression algorithm. This song was chosen because of its nearly monophonic nature and wide spectral content, making it easier to hear imperfections in the compression format during playbacks. Some jokingly refer to Suzanne Vega as "The mother of MP3".
User Comment
Submitted by algorithm on 8 February 2010
The power of a PC to prepare data for the c64. This is a remarkable innovation
User Comment
Submitted by grennouille on 7 February 2010
Thank you Irwin for the info!!
User Comment
Submitted by irwin on 7 February 2010
@grennouille: use WinVice 2.2 settings/sid settings/ sid-engine any 6581 resid-fp (importrant choose resid with "fp" at the end)


User Comment
Submitted by Oswald on 7 February 2010
hmm, well with the older vice I cant get rid off a high pitched carrirer freq. I thought it uses PWM.

hint: been reading the summary, with that knowledge (formants, pitch control, etc) you could make a sid tune with lyrics I guess.
User Comment
Submitted by grennouille on 7 February 2010
Wich settings do I need to use in Vice to hear something ?
User Comment
Submitted by Sixx on 7 February 2010
The work of a genius. What Radiantx said: Respect!
User Comment
Submitted by Mixer on 7 February 2010
It does use the 8 bit playout thing on voice 1. Very cool how the other 2 voices are used in reconstructing the sample :) a lot of matlab brute force needed for encoding :) I like this!
User Comment
Submitted by Radiant on 7 February 2010
User Comment
Submitted by Oswald on 7 February 2010
btw would be better with the vicious sid digi method.
User Comment
Submitted by El Topo on 7 February 2010
Doesn't voice also sound better than music at low bitrates due to its limited frequency spectrum?
User Comment
Submitted by Edhellon on 7 February 2010
@irwin: my guess for the choice of music is that this track was used as test-track when developing the original mp3 codec at Fraunhofer.
User Comment
Submitted by irwin on 7 February 2010
Amazing! but why a cappella? why no instruments, only voice?
Anyway fantastic job!
User Comment
Submitted by FATFrost on 7 February 2010
Fukkin cool shit!! Brapppp!!!
User Comment
Submitted by Edhellon on 7 February 2010
Insane! Really cool!
User Comment
Submitted by Oswald on 7 February 2010
fucking awesome!
User Comment
Submitted by iAN CooG on 7 February 2010
extremely compressed samples, still impressive result.
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· User Comments (32)
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