Repeat flags

[deladriere]

analyzing sounds from some old TMS5220 from the Talkie library shows lots of repeats.
I like them because my instruments use them a looping point.

I noticed that the repeat flag is never generated when I process sound with BlueWizardor python_wizard
Is it on purpose or it's just not yet implemented?

[ptwz]

Hmm, i'm not quite sure why they have been omitted. I went for a straight port, honestly mostly transcribing code without thinking too much about it.
Actually I have to read up on repeats and how they actually work, maybe you could give some insight. As far as I understood from the TMS emulator library, they just tell the chip to use basically the same excitation and filter parameters as in the last frame, right?

[deladriere]

Yes, that's all I know about the repeat flag: it was made to save some memory.
I also checked some LPC stream I made with QBOXpro: and they also lack the repeat flag.
Have also look here: more than 100.000 french words encoded with QBOXpro and they also lack the repeat flag.
I didn't look inside your code yet, but is there a place where it calculates the repeat flag?

[ptwz]

Well, currently there is neither repeat code in BW nor in PW. I guess I could implement it, if needed. Currently my day job takes quite some time, but I hope to get around to it..

[ptwz]

Tried something out in branch repeat_estimator, not finished yet though.

[toneburst]

Funnily enough, I have a use case for LPC files without either Repeat or Silent flags, so the current behaviour is great for me (at least for Repeat frames).

Could you make sure the current no-repeat-flag setup remains as an option, if you do add Repeat frame support?

Could you confirm that the Silent flag is also not supported? If it is, could you possible add an option to add silent frames (Amp and all “K” values zeroed?), instead of adding Silent frame flags to the output datastream?

Thanks very much for your work on this project! I’m so glad to have found it!!

[toneburst]

Funnily enough, I have a use case for LPC files without either Repeat or Silent flags, so the current behaviour is great for me (at least for Repeat frames).

Could you make sure the current no-repeat-flag setup remains as an option, if you do add Repeat frame support?

Could you confirm that the Silent flag is also not supported? If it is, could you possible add an option to add silent frames (Amp and all “K” values zeroed?), instead of adding Silent frame flags to the output datastream?

Thanks very much for your work on this project! I’m so glad to have found it!!

[toneburst]

Sorry, I didn’t notice how old this thread is. You’ve probably moved on to other things now. Completely understand if this is the case!