This is a question about file encoding and effect on battery life, so I don't know if I should post here or elsewhere.
In any case, I've been experimenting with using speex format (with audiobooks) to save space. However, I feel that playing the speex files may be draining the battery more quickly than playing the mp3 files I converted them from. Is this possible/likely?
I have been creating fairly high quality speex files - could this be having a negative effect on battery use? (i.e. would it be better to create more highly compressed speex files instead?) Specifically, I've been converting the mp3s to "wideband" 32k wav files, and then converting those wav files to speex using "speexenc" with the following settings: "--quality 10 --comp 10 --nframes 10".