Is it possible to reverse play a sound file?

Sound file formats viz .wav,.mp3,.aac etc.

Do the methods will vary for different sound file formats?

Thanks & Regards,

Prashant S Akerkar

Edited August 2, 20187 yr by prashantakerkar
Content

5 minutes ago, prashantakerkar said:

Is it possible to reverse play a sound file?

Sound formats viz .wav,.mp3,.aac etc.

Thanks & Regards,

Prashant S Akerkar

Well, you could do it with software, or, hardware.

With [software], you would want to simply want to 'reverse the play' by reading the file backwards. This can be done by recompiling the file to compile from bottom of the page of text to top, of course, but, let's say you do not have a compiler... Then you would want to simply change the binary for the file by taking the last bits of code and 'recoding it,' via... you now what, this all requires programming skills and programs, that might cost money, why don't you just 'record' and drag it back, with a small program for that? You can program, yes? This would require a mouse program to slowly at the right rate, hey I am no disc jockey, drag it backwards, yes? Should take about fifteen minutes or less, I figure.

With [hardware], you need only to reverse the charge. This would require the circuits operating in the same way, but only 'charging the file' to 'flip.'

Thank you.

Do the reverse methods will vary for different sound file formats?

Thanks & Regards,

Prashant S Akerkar

17 minutes ago, prashantakerkar said:

Thank you.

Do the reverse methods will vary for different sound file formats?

Thanks & Regards,

Prashant S Akerkar

No. They always compile, as they are written on a text file, of European base language format, from top to bottom, so you just find the data or sound bits, and compile them the other way.

~ If they used robots, like they should, you could manually do it by taking each robot and changing the order, of course.

May I ask what your fancy is, why are you into this... this... perversion of music? 

2 hours ago, Brett Nortj said:

No. They always compile, as they are written on a text file, of European base language format, from top to bottom, so you just find the data or sound bits, and compile them the other way.

What are you talking about.. ? What text file? Audio files are binary files, mostly compressed one.. Only raw format could be reversed by reversing order of bytes in file, as long as you know how many bytes per sample is (usually 1 or 2), and how many channels (usually 1 or 2), and byte order (Intel-compatible or Motorola-compatible).

.wav file format has header at the beginning of file. If data are not compressed (wFormatTag set to WAVE_FORMAT_PCM), it would be 2nd the easiest (after plain raw format) to reverse in custom made script. 5-10 minutes to write it or so.

https://docs.microsoft.com/pl-pl/windows/desktop/api/mmreg/ns-mmreg-twaveformatex

2 hours ago, prashantakerkar said:

Do the reverse methods will vary for different sound file formats?

Yes.

 

Thanks.

Sound recorder program for Windows with Source code can be a good source input for creating reverse recording & playback computer program of a sound file?

Thanks & Regards,

Prashant S Akerkar

Edited August 2, 20187 yr by prashantakerkar
Content.

Here's a tutorial explaining how to reverse a .wav file using C#:
https://medium.com/swlh/reversing-a-wav-file-in-c-482fc3dfe3c4

WavePad(NCH software)  is a downloadable sound editor that is compatible with a number of formats, including mp3 and wav. ( you could even upload in one format and save as another*)

It has a "reverse" feature as well as other editing options.

It has a free unlicensed version for personal home use and a licensed commercial version.

* Some of the "save as" options, such as mpeg-4, are limited to the commercial version.  You can upload mpeg-4 files, you just have to save the edited file as something else.