> Does anyone have any suggestions on how to compress MP3 files that contain > speech and no music?
Sounds Cool, Andy. Here are some of my suggestions. :) What is the bit rate of the MP3? I've found that 64 kbps (kilobit per second) will suffice for speech. Telephones are 8 kbps. http://en.wikipedia.org/wiki/Bit_rate What sample rate is the MP3? CD is at 44.1 kHz. Telephone is at 8 kHz http://en.wikipedia.org/wiki/Sample_rate A good way to reduce file size is to resample the file, make a new copy at a different resolution. ex. a new bit rate of 64 kbps and a new sample rate of 22 kHz per second. There are also Variable Bit Rates that can tweak this balance between file quality and file size. http://en.wikipedia.org/wiki/Variable_Bit_Rate At a certain point you might want to use a more efficient audio codec. Unfortunately not everyone can listen to the file types made from these codecs. MP3 is the most prevalent. ex. lossy: Ogg Vorbis http://en.wikipedia.org/wiki/Ogg_Vorbis lossless: flac http://en.wikipedia.org/wiki/FLAC shorten http://en.wikipedia.org/wiki/Shorten Just chopping up the MP3 into several parts works. :) -Brian > Hi everyone, > > I've made an MP3 file of yesterday's webcast tour of DDN's disaster > relief community and placed it online here: > > http://www.andycarvin.com/audio/ddn-tsunami-tour.mp3 > > Because it was a long tour, the file is huge - around 60 megs. Does > anyone have any suggestions on how to compress MP3 files that contain > speech and no music? > > Thanks, > ac > > -- > ----------------------------------- > Andy Carvin > Program Director > EDC Center for Media & Community > acarvin @ edc . org > http://www.digitaldivide.net > Blog: http://www.andycarvin.com > ----------------------------------- > _______________________________________________ > DIGITALDIVIDE mailing list > [email protected] > http://mailman.edc.org/mailman/listinfo/digitaldivide > To unsubscribe, send a message to [EMAIL PROTECTED] > with the word UNSUBSCRIBE in the body of the message. > _______________________________________________ DIGITALDIVIDE mailing list [email protected] http://mailman.edc.org/mailman/listinfo/digitaldivide To unsubscribe, send a message to [EMAIL PROTECTED] with the word UNSUBSCRIBE in the body of the message.
