> Just curious, is it possible to amplify Ogg frames without a decode/encode > cycle? I usually normalise before encoding all recordings for my radio > station, but I obtain some music from 3rd parties and it often need > normalising. I find this ability very useful for MP3s and it would be a big > handicap to me if Ogg can not.Add a comment into the ogg file : VOLUME_ADJUST=1.3 Add this line in the decoder/player ( preferable at a point where the samples are in floating point format ) : ample_value *= VOLUME_ADJUST ; Finished ! It requires changes in the player/decoder though : - parsing the comments - the line above Off course you also need an app to measure the song volume and recommend an adjustment, but that can also be done by hand ... -- David Balazic -------------- "Be excellent to each other." - Bill & Ted - - - - - - - - - - - - - - - - - - - - - - --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.
David 'Superkind' Roden
2001-May-11 08:55 UTC
[vorbis] Amplify Ogg files without decode/encode
> Add a comment into the ogg file : > VOLUME_ADJUST=1.3 > Add this line in the decoder/player ( preferable at a point > where the samples are in floating point format ) : > sample_value *= VOLUME_ADJUST ; > Finished !Beware of the Evil Clipper! :)> Off course you also need an app to measure the song volume and recommend > an adjustment, but that can also be done by hand ...ox does.> David Balazic-- David 'Superkind' Roden | http://www.uni-neukoelln.de/ IRCNet: #Berlin | superkind@uni-neukoelln.de --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.