Twelve Black Code Monkeys

My killer feature for the iPod is something that probably doesn’t appeal to you. Ok, maybe some of you, but not many. It’s the feature that Apple introduced with the 4G iPods back a couple of years ago. The feature is the ability to speed up (or slow down) audio without changing the pitch (if you are familiar with variable speed tape recorders, you understand that simply speeding up the playback of something tends to also make the speaker sound like a chipmunk).

Why is this a killer feature? It lets you play one minute and fifteen seconds of audio for every minute you listen. In other words, you get an extra 25% of content. I listen to a lot of spoken audio – audio books and podcasts – and this means that I get to enjoy a lot of extra content in the same stretch time. It’s a time saver. You get to save countless hours by listening at faster speeds, just as a speed reader gets to read many more books in the time a normal reader would.

There are some downsides, but I don’t think they are significant for most audio. One is that you have to pay closer attention, since drifting off a bit will mean that you will miss a lot more than you would normally, plus it just takes more concentration to comprehend everything at a higher speed. There are some audio artifacts that sometimes occur as well. Those artifacts aren’t jarring, but do degrade the sound quality slightly. Oh yes, and of course you just have a different listening experience. For some audio, timing and cadence can be a big part of the narrator’s performance. Speeding this up can wreak havoc on it - especially for dramatic naration of audio fiction. On the other hand, I’ve gotten so used to listening to nonfiction at this speed that now when I listen to podcasts at the normal speed, the speaker sounds like he’s talking in slow motion! So to some degree it’s just a matter of getting accustomed to it.

While the iPod is the only (or one of the few) digital audio players that has this functionality built in, it doesn’t let you just listen to anything in this fashion. Nope, you can listen to Audible.com audio books (or Audible’s other paid content like radio programs, newspaper transcripts, etc.), and you can listen to files in AAC spoken word format (.M4B). Since most podcasts are in MP3 format, you have to convert them. This is one reason why I use Doppler Radio as my podcast program, or “podcatcher” – it is the only podcatcher that I’ve found wihich converts files to .M4B. Some others convert to .M4A, but you still need to rename them and that implies updating iTunes with the new filename – a manual and cumbersome process.

While Doppler’s conversion works well, it has its disadvantages too, the main one being that iTunes (which is the program actually doing the conversions) can take a while to convert files. The fastest I’ve seen it work is 20X (or 20 times real time). So an hour-long show will take about 3 minutes at that speed. But most of the time, it seems to range from 5 to 12X, or 5 to 12 minutes per hour-long show. iTunes can only convert one show at a time, and so if you have a couple of hours worth of shows downloading at a given session, this could take upwards of 25 minutes to convert! It’s far from ideal.

Now, while I do have this killer feature with the iPod, I would rather that such a feature existed on other devices so that I wasn’t forced to only use an iPod. Don’t get me wrong, I like my iPod, but there are certainly things I don’t like about it as well. The main thing that irks me about it is that you can’t use music subscription services like Yahoo! Music because it won’t play Windows Media files. Apple’s system is built to be proprietary – you can only use the iTunes Music Store to download music (other than free MP3’s from independent artists or your own ripped from CD), and the iTunes Music Store only supports Apple devices. For those who need the speeding up feature, unfortunately, the iPod still seems to be your only choice.

While I could not find other players with this functionality, I thought I’d see what I could find out about speeding up audio in general. My main find proved quite interesting. It’s a Windows software program that does this very thing called, inappropriately enough, Amazing Slow Downer (or ASD), by Roni Music. I guess the name is somewhat appropriate because it can slow audio down, but it can also speed it up. I’m not sure about the utility of slowing things down, but my guess would be so that musicians can listen to a song at a much slower rate in order to pick up notes and chords more easily?

ASD allows you to take any MP3 file (or other formats as well), speed them up or slow them down arbitrarily with a fine degree of control, and then rip them to MP3 (or another format for other encodings). You can control the pitch yourself, although it seemed to automatically handle that. You can also control the audio qualities via an equalizer in order to yield the best quality sound. I played around with the trial version I downloaded from Roni Music’s site and was able to speed up a sample podcast by 42% and still follow everything. I figure you could probably train yourself to understand higher and higher levels of speed.

This was a great find and maybe there are other such applications out there but I haven’t found any yet. As nice as it is, though, I can see using it for major jobs, but not on such a regular basis as Doppler. Much of the spoken word audio I listen to is downloaded via Doppler on almost an hourly basis. So when I listen to something, it’s often only hours or at most a few days old - an ongoing stream of current podcasts. Unfortunately there’s no way to have Doppler “talk” to this program and have it automatically convert these podcasts into faster ones. Neither is there a command-line interface as far as I can tell, so even if Doppler could issue external commands (which I’ve seen in some other podcatchers), this wouldn’t work. What you would have to do is dump all my podcasts into one directory (Doppler puts them into separate directories named after the podcast’s title) and before uploading them to the iPod you would have to run this program and tell it to convert all new files – also determining which of those files were new so that you weren’t reconverting already converted ones (you could change the names or put them in different directories but this would then mean having to go into iTunes and tell it where those new files were, or what they’d been renamed to – otherwise iTunes would remove them from the iPod). Neither will ASD do anything with Audible files, which is to be expected since they have a proprietary DRM. Then there’s the issue of speed. The trial version of ASD only lets you work with 3 minutes worth of audio. I was able to rip this to a 2-minute-long MP3 in a matter of seconds, but it’s hard to extrapolate this to a 30-minute podcast, let alone a bunch of podcasts of various lengths adding up to a couple of hours worth of listening.

Where ASD might come in handy is if you find a bunch of MP3 spoken word files that you want to listen to - say open source stuff from Librivox or Project Gutenberg. Or possibly if you find a podcast that you’ve never heard but has been recording for many months and you want to catch up and listen to all the old episodes. Or you buy a new audio book on CD and want to rip it to MP3 to play it on your portable device. I can see using this for such things because they are one-shot deals rather than a constant, ongoing process.

We can dream that Erwin Van Hunen, the creator of Doppler, will put this type of functionality into Doppler 3.0, but considering how busy he is with other things, it’s hard to imagine that he could devote such resources to what is essentially donationware.

Despite the probably small number of people who find this functionality irresistible, perhaps there are enough of us to encourage a developer out there to create a podcatcher that has similar functionality, or maybe the developer of ASD will actually consider developing a podcatcher with it? Or perhaps we can get Roni Music to partner with Erwin and come up with a premium podcatcher that has this functionality. Well, we can dream!