Supertux soundtrack9/28/2023 ![]() Before that, he also did an intro to the technical side of digital media if There’s a light-hearted video that’s about 20 minutes and definitely worth watching This example isĮxtreme, but the same idea is behind dithering digital audio when approximating smooth analogue signals.īy the way, Chris Montgomery (who developed Ogg Vorbis) made an excellent presentation about the real-world issues (and Turns the image into regions of solid black and regions of solid white, with all detail lost except near the threshold.Īdding random noise before converting fuzzes the threshold, allowing more detail to come through. However, even if we’re looking at computer-generated music, weĬan’t guarantee the loop will be exact for a variety of reasons like phase distortion (which will come up again later),Ĭonverting this greyscale image of a ball in a room to a black/white image demonstrates dithering. Used to help here (e.g., Rabin-Karp or suffix trees). Now, if we could guarantee the music data would repeat exactly, there are many super-fast algorithms that could be All you have to do is take two copies of the music side by side, and slide one copy along until youįind an offset that makes the two copies match up again. If you don’t care about performance, estimating the period at which the music repeats itself is pretty ![]() Measuring the music loop length (or “period”) I looped it a couple of times and added silenceĪnd fade in/out to the ends. Loop data, and then construct a longer version by copying and splicing together pieces of the original.īy the way, the examples in this post useīeneath the Rabbit Holes by Jason Lavallee from the soundtrack of the FOSS platform game SuperTux. Loopx needs to analyse the music file to find the music Some tracks will also have some kind of intro before the loop, butĮven if they don’t, they’ll usually have some fade in and out. Won’t be perfectly trimmed to the right loop length. It would be easy if we could just play the original music sample on repeat. So this side project got me digging up some old theory again. About ten years ago I was doing digital signal processing (DSP) programming for industrial metering equipment, Quality extended music audio out of real-world samples (and doing it fast enough) takes a bit of maths and computer When you’re listening to the same music loop for a long time, even slight distortion becomes distracting. So I made loopx, a tool that takes a sample of music that loops a few times,Īnd repeats the loop to make a long piece of music. The harder problem is finding samples that play for more than a few minutes. Computer game music is like that, by design, so there’s plenty of good background The best music for that is simple and repetitive - something nice enough to listen too, but not distracting, and If you can’t fallĪsleep or completely clear your mind, zoning out to some music is the next best thing. Quiet background music is good for meditation or dozing, too. ![]() But for other work (like doing business paperwork), I prefer to have quiet music in theīackground to help me stay focussed. Some work (like programming) takes a lot of concentration, and I use noise-cancelling headphones to help me work
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