Differences
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| lynx:abcmusic [2021/01/25 11:59] – Karri Kaksonen | lynx:abcmusic [2021/01/25 12:17] – Karri Kaksonen | ||
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| In Atari Lynx we use proprietary ABC codes to set the hardware for the tune. I try to describe the recognized operators. | In Atari Lynx we use proprietary ABC codes to set the hardware for the tune. I try to describe the recognized operators. | ||
| - | '' | + | '' |
| - | T10 - number of VBL interrupts that makes up a single time slot. The smaller you set this number, the faster the music plays. | + | T10 - Tempo - number of VBL interrupts that makes up a single time slot. The smaller you set this number, the faster the music plays. |
| - | Waveform: | + | |
| X7 - waveform. This describes how the feedback links are connected to the polyphonic sound generator. - I don't get it either. | X7 - waveform. This describes how the feedback links are connected to the polyphonic sound generator. - I don't get it either. | ||
| - | Square wave or not: | + | I0 - a letter I plus zero means a square wave, a one means a triangle wave. Triange has a smoother sound. |
| - | I0 - a letter I plus zero means a square wave, a one means a triangle wave | + | V100 - volume. Max is 127, min is 0 |
| - | + | O2 - octave from 0 to 5. 5 is very low and 0 very high. You can also change octave in the middle of the tune. O2 A is the same as O3 a. | |
| + | R0 - envelope ramp up | ||
| + | H0 - envelope hold note | ||
| + | K3 - envelope ramp down | ||
| + | These envelope parameters apply to the volume of a note. | ||
| '' | '' | ||
| In ABCmusic we need to code every one of these 3 melodies to a string. You can omit white space and bar lines without repeats to save space. | In ABCmusic we need to code every one of these 3 melodies to a string. You can omit white space and bar lines without repeats to save space. | ||
| - | '' | + | '' |
| - | char *bass = "D,4 G,4 | D,4 G,4 | D,4 G,4 | D,4 G, | + | char *bass = "X7O2I1V100T10R0H0K3 |
| - | char *percussion = "D2 G G D2 G2 | D2 G G D2 G2 | D2 G G D2 G2..." | + | char *percussion = "X7O4I1V40T10R0H0K6 |
| '' | '' | ||
| After this we can play the combined tune by making a call to abcplay() | After this we can play the combined tune by making a call to abcplay() | ||
| - | abcplay(0, melody); | + | '' |
| abcplay(1, bass); | abcplay(1, bass); | ||
| abcplay(2, percussion); | abcplay(2, percussion); | ||
| + | '' | ||
| This is how the note part works. But we still have to choose the instrument, the tempo and the volume of the music. | This is how the note part works. But we still have to choose the instrument, the tempo and the volume of the music. | ||
| {{ : | {{ : | ||