A Script for Common Phone Signals
Here’s a quick script for those who want to have clean, clear phone signal sounds (such as dialtone, busy signal, or DTMF frequencies) for projects needing them.
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Blender Character Design
Not really a tutorial on my part, but then, I don’t really need to make the tutorial myself. One of the things one can do in blender is create characters to animate in a plethora of ways, and make them look realistic in the process; this was, in fact, the …
Signals and the Signal Chain
The microphone is an important part of any sound recording process; this actually transforms the spherical ripples of compression and expansion in the air into an electrical signal. However, once the signal has been created, there are a large number of things that can be done with it. You can …
The Fundamentals of Sound
Before you can record any audio, you must first know how audio actually works. This is important in a number of ways, especially when attempting to understand concepts like frequency, amplitude, phase, and reverb. You can make sound happen without knowing the concepts, but knowing why something works makes it …
History and Clarification of Linux Audio
This article will be pretty dry of actual, useful content. if you’re looking for a how-to article, this will probably be a disappointment. Still, if you’re wondering what the differences are between Alsa, Jack, PulseAudio, and other tools, this might help give you a little perspective. Some of the things …
Did You Know? Voice Frequency Facts
Human speech spans the range between 70 Hz and 10 KHz. The absolute lowest note a human has been known to sing is D2, which has a frequency of 73 Hz. This requires effort and strong lungs, and is much lower than the lowest human speaking voice, barring those whose …
Understanding the Jack Buffer
An interesting question was asked recently. Why is latency affected by the sample rate? Isn’t the sample rate time-neutral? Doesn’t it introduce more sound data, and do so over the exact same time period? After all, one second of sound data is one second of sound data, regardless of whether …
MIDI Quick Basics
MIDI stands for the “Musical Instrument Digital Interface,” and its original purpose was, and still is, to send note commands from a controller to a sound generator. No matter what MIDI equipment there is out there, it always comes in three forms, controllers, interfaces, and sound generators. MIDI Controllers MIDI …
Using Jack with Different Non-Jack Programs
Not all the audio applications available for Linux are Jack-aware; most of the consumer-grade programs, such as media players and podcatchers, are limited to either Alsa or the consumer-grade audio servers (PulseAudio, GStreamer). This can be tricky when you want to use them as part of a recording or broadcast …
Jack’s Timekeeping Tools
When working with multimedia, timing is essential. One second difference in sync can be all the difference between a winning mix and a horrible mess. This is why the preparations put so much effort into eliminating latency; any delay can be a bad thing, especially when mixing different signal types …