audio conversion/normalisation ?


Recommended Posts

can anyone suggest an app (or anything else) that will let me level out the volume of various MP3s so that they are all the same and then export them to WAV, AIF, or CAF?

the MP3 files are short (no longer than 30 seconds).

also be preferrable to be able convert them from stereo to mono (basically good enough to be played on a mobile device and no more).

Link to comment
Share on other sites

File->Convert Files. Then select the .mp3 files you would like to convert.

Then in the preferences->formats configure the type of file you would to convert the mp3 to.

There's every file format from FLAC to XI.

Link to comment
Share on other sites

ok got it to convert, but the resulting file size is way too big.

original mp3 file - 199Kb

converted AIF file - 430Kb

file is 5 seconds long.

any suggestions for getting this down to the same as the mp3 file or smaller?

Link to comment
Share on other sites

i don't want lossless, but the tool that i am going to be using the sound files in needs them to be either WAV, AIF, or CAF.

430Kb per file is too large.

there are 12 files in total to convert.

Link to comment
Share on other sites

i don't want lossless, but the tool that i am going to be using the sound files in needs them to be either WAV, AIF, or CAF.

430Kb per file is too large.

there are 12 files in total to convert.

Well the problem is that those are lossless audio formats which are uncompressed. (at least WAV and AIFF)

Bitrate for WAV and AIFF are calculated like such: (sample rate) * (bit depth) * (number of channels) = kbits per second

sample rate: 44100 Hz

bit depth: 16-bit

channels: 2

44100 * 16 * 2 = 1411 kilobits per second. So that's 173 kilobytes per second of the audio clip.

Large file size.

Link to comment
Share on other sites

yes but if change it from stereo to mono and lower the bitrate etc, i should be able to have a smaller file size ?

Mono should decrease the file size, yes. I wouldn't change the sample rate or bit depth as that would be going lower than CD quality.

Link to comment
Share on other sites

Go for it then.

with what app?

i've not been able to work how to specifically do this yet with any of the recommended apps.

i can easily conver them to WAV, but not convert to mono and lower bitrate as well.

Did you manage to sort it chenks, fella?

no not yet

Link to comment
Share on other sites

with what app?

i've not been able to work how to specifically do this yet with any of the recommended apps.

i can easily conver them to WAV, but not convert to mono and lower bitrate as well.

no not yet

Use mp3gain to adjust the volume. Then in Max, convert that mp3 to another mp3, this time making it mono. Then take the resulting mp3, and convert it to 8-bit wav.

Screen%20shot%202009-11-17%20at%2011.37.28%20PM.png

Screen%20shot%202009-11-17%20at%2011.24.58%20PM.png

iTunes can also do this second part in one step. (8-bit and mono, as well as the sample rate which Max doesn't seem to be able to adjust)

Screen%20shot%202009-11-17%20at%2011.39.43%20PM.png

Link to comment
Share on other sites

This topic is now closed to further replies.
  • Recently Browsing   0 members

    • No registered users viewing this page.