Sound Coder - a 32k sound codec demo released at Stream 2012

[Tjoppen]

Something me and Knoeki threw together for the oldskool demo competition at Stream 2012 - placed 2nd.

It uses the 1-bit ADPCM compression technique I've mentioned in the coding subforum.

http://pouet.net/prod.php?which=59283

http://www.youtube.com/watch?v=tEYH1-MY9s8

[Tjoppen]

Bumping because I'm interested in seeing what you guys have to say. Maybe I should have posted this in the programming forum?

[+GroovyBee]

I'd be interested to know on what methods you used to compress and play back the data.

[BioForceApe]

When is another comp coming up? I want to finish my 4k entry, which... is just a plain Batari Game.

[+RevEng]

Sounds good!

 

How frequent are the audio register updates, and are you providing vsync?

[solidcorp]

Very cool.

 

We're a step closer to mp3 playback

 

Do you have any demos that use non chiptune/techno samples, like something with conventional instruments and human voice?

[Tjoppen]

I'd be interested to know on what methods you used to compress and play back the data.

The codec is similar to DPCM and can be thought of as a state machine. I've posted about it in the programming forum earlier.

The release includes source code and the encoder, so you can mess around with it if you like.

 

How frequent are the audio register updates, and are you providing vsync?

AUDVx are updated every scanline. I'm not doing any VSYNC, which means it won't work properly in Stella.

 

Do you have any demos that use non chiptune/techno samples, like something with conventional instruments and human voice?

No, but I almost went with this: http://www.acc.umu.s.../vcs_roll'd.ogg (uses older, crappier version of the encoder)

 

When is another comp coming up? I want to finish my 4k entry, which... is just a plain Batari Game.

Demo parties still happen quite frequently. Check demoparty.net for a calendar.

[Godzilla]

i am forever amazed by what is wrung out of the lowly 2600! that was badass!

[awhite2600]

I love this demo. Quadrun did sampled speech "back in the day". This demo takes things to a whole new level.

 

 

Do you have any demos that use non chiptune/techno samples, like something with conventional instruments and human voice?

No, but I almost went with this: http://www.acc.umu.s.../vcs_roll'd.ogg (uses older, crappier version of the encoder)

 

 

A 2600 Rickroll would be a great joke... "Here, try this great new game on your Harmony cart."

[Godzilla]

reminds me of the sample quality of my ol covox voice master on my c64 would love to hear a sample of quiet riots c'mon feel the noise to compare to the old c-64 sample

[Keatah]

Where yo'download this?

[TwentySixHundred]

Yeah that is awesome, i wanna download this aswell

[Tjoppen]

Keatah, Tony: Just follow the links on the pouet page: http://pouet.net/prod.php?which=59283 -> http://www.acc.umu.se/~tjoppen/files/vcs/Sound_Coder_by_DSS.zip and http://www.acc.umu.se/~tjoppen/files/vcs/Sound_Coder.ogg