etc
/
furnace
mirror of https://github.com/tildearrow/furnace.git
0
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

More stuff! And things.

This commit is contained in:
Electric Keet 2023-09-05 12:45:49 -07:00
parent e68c0cbd75
commit a86f37ac4d
1 changed files with 17 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
doc/1-intro/glossary.md
View File

@ -69,6 +69,8 @@
**macro**: a sequence of values automatically applied while a note plays.
**noise bass**: the technique of using a PSG's periodic noise generator with a very short period to create low-frequency sounds.
**normalize**: to adjust the volume of a sample so it is as loud as possible without adding distortion from clipping.
**operator**: in FM, a single oscillator that interacts with other oscillators to generate sound.
@ -77,10 +79,14 @@
**PCM**: pulse code modulation. a stream of data that represents sound as a rapid sequence of amplitudes.
- CD tracks and .WAV files are PCM.
- .OGG and .MP3 are compressed differently from PCM. they must be converted to .WAV outside Furnace before they can be used as samples.
- .FLAC files are compressed PCM that must be converted to .WAV outside Furnace before use.
- .OGG and .MP3 are compressed differently from PCM. they must also be converted to .WAV before use.
**period**: the length of a repeating waveform. as frequency rises, the period shortens.
**periodic noise**: an approximation of random noise generated algorithmically.
- the period is the number of values generated until the algorithm repeats itself.
**phase reset**: to restart a waveform at its initial value.
- for FM instruments, this restarts the volume envelope also.
@ -101,9 +107,11 @@
**register**: a memory location within a sound chip. "register view" shows all the relevant memory of all chips in use.
**sample**: a digitally recorded sound. usually stored as some variant of PCM.
**sample** (1): a digitally recorded sound. usually stored as some variant of PCM.
- these can take up a lot of room depending on length and sample rate, thus older systems tend to use short, lower quality samples.
**sample** (2): a single value taken from a digitally recorded sound. a sample(1) is made up of samples(2).
**signed**: a digital representation of a number that may be negative or positive.
- if an imported raw sample sounds recognizable but heavily distorted, it's likely to be unsigned interpreted as signed or vice-versa.
@ -114,7 +122,7 @@
**square wave**: a wave consisting of only two values, high and low, with equal durations within the wave's period.
- this is equivalent to a pulse wave with a duty of 50%.
**supersaw**: a sound made up of multiple saw waves at slightly different frequencies to achieve a flanged effect.
**supersaw**: a sound made up of multiple saw waves at slightly different frequencies to achieve a chorusing effect.
**tick rate**: the rate at which the software controlling a sound chip sends commands to it.
- this usually corresponds to the frame rate the system uses for video, approximately 60 for NTSC and 50 for PAL.
@ -127,6 +135,11 @@
- different versions of the VGM format have different capabilities, with trade-offs. older versions may lack chips or features; newer versions may not be compatible with some software.
- samples are stored uncompressed. PCM streams (such as DualPCM) can quickly take up a huge amount of space.
**wavetable**: a very short looping sample.
**waveform**: a very short period of repeating sound.
- the most basic waveform is a sine wave. others include triangle, pulse, saw, and the like.
**wavetable** (1): a very short looping sample.
**wavetable** (2): an ordered group of wavetables(1) used in sequence within a single instrument.
**ZSM**: a VGM-like file meant specifically for the Commander X16 computer.