Cheat Engine

HomerSexual

Hey guys I'm in need of some help or ideas in a new project i'm working on. The first thing i need to figure out how to do is get the frequency of any point in an audio file (mp3, wav, not midi). What is the best way to go about this? I read that midi might be the best way to go since it's easy to retrieve the frequency, but the input files wouldn't be midi, they would preferably be .mp3 or something that can be converted from .mp3 very easily.

If i need to elaborate anymore, let me know. Thanks

tombana · Posted: Sat Oct 02, 2010 2:21 pm Post subject:

MP3 files are compressed, so to access the raw audio data your program will have to convert it to a raw uncompressed format like WAV anyways. I'd just find some audio conversion library and use that.
From thereon you can open the WAV file and analyze it's data. You can google 'wave file format' for information about that. Example: https://ccrma.stanford.edu/courses/422/projects/WaveFormat/

EDIT: I continued reading about that format, and discovered that the raw data are 'samples' which are not directly frequencies. So I guess that the link of 'justa_dude' would be more helpful.

justa_dude · Posted: Sat Oct 02, 2010 2:21 pm Post subject:

If you're reading the raw files, the process is going to depend very much on the encoding. I suggest you look at existing libraries, especially those with spectrum analyzers or mp3 visualization tools.

There's a pretty good walkthrough for making a spectrum analyzer in Java here.

Cheers

Jorg hi · Posted: Sat Oct 02, 2010 9:12 pm Post subject:

Java is a high platform language, but this is just one of its cons.

HomerSexual · Posted: Sat Oct 02, 2010 11:13 pm Post subject:

justa_dude · Posted: Sun Oct 03, 2010 1:35 am Post subject:

You should probably check out csound, too. I'd imagine there's a Java port around somewhere.

HomerSexual · Posted: Sun Oct 03, 2010 12:16 pm Post subject:

the Shazam thing is very very vague, ugh. I'm working on it though. Will check out alternatives