Advice needed for fine-tuning Flipnote 3D's sound format by daeneeil at 3:48 AM EST on February 2, 2015

Hello, recently I have been trying my hand at decoding Flipnote 3D's .kwz file format, which is used for saving gif-like animations, with sound.

I made some progress with getting the sound section decoded - it seems to be similar to Flipnote Studio's PIKA ADPCM format, just sampled at 16 kilohertz - however there are a series of annoying 'pops' throughout playback, which, of course, shouldn't be there.

here is the raw sound data
and here is my attempt at decoding it

We used sox to decode this, using the command: sox -t ima -r 16k -N input output

If anyone has any advice on how to decode this properly, I would very much appreciate it!

P.S. Thanks to Sudofox for hosting the files. ( :

edited 8:56 AM EST February 2, 2015

edited 8:58 AM EST February 2, 2015

by sudofox at 3:52 AM EST on February 2, 2015

Hi there. c:

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