Even with aggressively low bitrates my files were still a little too big. The final setup I came up with is actually a combination of the two programs. But never fear, SoX(The SOund eXchange) comes out of the box with full AMR support(at least out of apt). However, the stock install I have handy right now wasn't built with AMR encoding support. But hey, it's not like we are going to get silky smooth audio off a floppy disk anyway.įor encoding my go-to is always FFmpeg. Boasting a fixed 8kHz sampling rate, and able to go as low as 1.8 kbit/s, it doesn't sound all that good. If you've ever made a call on a cellphone you've experienced the glory of AMR. One of its major benefits is that it's tiny. AMR is an audio coded that's widely used for transmitting telephone calls over GSM networks, but it can just as easily be used to encode full audio files. The one I went with, and I think the only one that can actually work for these purposes, is the Adaptive Multi-Rate codec. Those all have their place, but they produce pretty big files. MP3 is the most familiar, but you also have formats with better compression like AAC, or lossless formats like FLAC and WAV. Now, there are probably well over a hundred different ways to encode and package up audio. And with a little doing it's possible to actually fit close to an hour long podcast episode on a single disk. That got me to thinking, just how far does that rabbit hole go? As it turns out, pretty far. They can fit an album, albeit a short one, on a single 1.44 megabyte disk. One great example is STRUDELSOFT, a vaporwave label that only publishes music on floppy disks. But there's no reason to you can't go the other way. Usually the goal with transcoding is to turn some format audio file into another format while maintaining its quality. In my day-to-day life I tend to do a lot more encoding and transcoding that most people. I also host a computer history podcast on the side. If you were being generous you could say I work in the broadcasting industry, I'm a software developer for an audio-focused CDN. Each episode is guaranteed to be under 1.44 megabytes. Allow me to introduce Advent of Computing: extreme lo-fi edition. Do you want to learn about the history of computers? Are MP3 files just to darn big? Can you only listen to audio streamed off a floppy disk? Well, then I have just the podcast for you.
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