Why not a ".TSX" Format for MSX Tapes?

If size is the only problem, mp3 & m4a support will achieve much better results. There are libraries for that everywhere, and the user could use their cell phones and MP3 players as high quality "tape" recorders on the real MSXs.

Preserving tape games sounds like a very worthwhile goal. There are a lot, some really good ones, and they don’t get much attention.

But you can start digitising them today! By definition, wav is a perfect copy. Well, as close as digital can get to an analog signal at least. Why wait for some other format that still needs to prove itself, possibly causing incorrect dumps because it doesn’t interpret or represent the audio data correctly? Once you have the wav files, you can always convert them to another file format later… That’s what’s so great about wav, it’s universal and directly represents the tape’s audio data.

filter out the noise and lossless compress as FLAC? (no MP3!)

I generated low hz wav, it works.
9600hz, 4 samples per bit, makes 2400 baud.
tool with sources is at https://sites.google.com/site/tueftlerlabs/home/downloads/lw...

loading to real machine with audacity over a wire without eletcronics.

I am still not clear what the desire for ZX formats actualy is about.
The tool expects a BLOAD file on the PC.
How do you get it there. I got no idea, but "a cool file format" doesnt answer that question.

Maybe the desire is just because the ZX tools have the nice word "preservation"?
The low hz wav is fully digital preservation! :)
That's what wavs always kind of been, but when in doubt their curves need interpretation.
But in a low hz wav, 4 sample bytes clearly correspond to one MSX bit.

The great thing is it works without any new format.
And a zipped wav is nicely small. With a 14k .sc2 I am getting 16k.

/ironic mode on/

Yep, WAV (most modern,confiable and wonderful format for "preservation":

1.- For multiload games and multigame tapes (it has "block address control" and "motor state command control")
2.- For storing in little space (wav is the most efficient compressed format)
3.- Zipping a wav? really? (zip multimedia/fractal compression is wonderful)
4.- Wav format has a built-in integrity control
5.- Most of audio equipement can avoid pulse audio tricks of protected tapes, specially integrated audio cards
6.- Wonderful aleatory access to any data contained on it

/ironic mode off/