I have a venerable Olympus VN-960PC that I just love, and it still works well. My ONLY issue with the thing is that I cannot find a Voice File Editor to use with it! Many times, there are long silences in my recordings that I would like to edit out. I have been able to OPEN the files quite easily using some voice-file editors (e.g. Nero); but cutting out the silence in a recording which is (say) half-silence, results in a file size that is TWICE as large (or larger) than the original! (I am aware that Olympus employs an ADPCM/four bits “compression” thing, which is totally non-standard.)
I just downloaded the newest Audacity (including plug-ins), and I have “messed around” with exporting a copy as a 16-bit WAV file. However, even without any editing, Audacity exports the file to something that is FIVE TIMES the size of the original!
I just wondered if anyone had tackled this particular type of Olympus file before, and had any suggestions as to how to work with it.
(1) I did not try “importing” the file into Audacity; I just did “File|Open.” Would I gain anything by importing it?
(2) Is there a plug-in/converter that I need to download and use? (links and instructions are appreciated…)
(3) WAV is a very easy and comfortable standard for me to work with; however, if I HAD to convert the file to something like MPG (within Audacity), that wouldn’t be a TERRIBLE outcome.
(4) I know, I know: “Spend $30 and go buy yourself an MPG-based recorder!!” But I hate to throw out gear that still works; and besides, I’d still like to edit some of those old files.
Thank you for a complete, concise and annotated response! I don’t know how I would have figured out this routine by myself.
One question: you said: “If you want to export to 4-bit ADPCM WAV, choose “Other uncompressed files” when you export…”
Am I correct in assuming that even though the Export category is called “Other uncompressed files”, exporting to the 4-bit ADPCM WAV format (as you describe) will result in “compression” similar to that claimed by Olympus? (from their website: “Adaptive Differential Pulse Code Modulation (ADPCM) compresses files by saving them as WAVE files with a bit depth of four bits rather than the 16 bits typical of other audio formats.”)