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50b1e71521
Sounds are packed into a bank, loaded, copied to Ensoniq RAM, and can be played through oscillators. The most basic form of GS sound system.
62 lines
1.8 KiB
Bash
Executable File
62 lines
1.8 KiB
Bash
Executable File
#!/bin/bash
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############################################
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# Takes a list of WAV files for the sound effects,
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# downsamples them to GS-friendly rates,
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# and packs them into a 64k block that can
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# be loaded into Ensoniq RAM
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#
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# IMPORTANT: This depends on sox, which MacOS doesn't have natively.
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# You can get it from Homebrew ("brew install sox")
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#
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# Big thanks to Jeremy Rand, from whom this approach
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# borrows heavily
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# https://github.com/jeremysrand/BuGS/blob/master/BuGS/sound/sources/createRaw
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rm -f "SoundBank#060000"
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rm -f "Sound/SoundMap.txt"
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currAddr=0
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for (( index=1; index<="$#"; index+=2 )); do
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waveFilePath=${!index}
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# Downsample and convert to 8-bit unsigned raw waveform
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rateIndex=$((index+1))
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rate=${!rateIndex}
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sox "$waveFilePath" -c 1 -r "$rate" --bits 8 --encoding unsigned tempSound.raw
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waveFile=$(basename -- "$waveFilePath")
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rawFile="Sound/Generated/${waveFile%.wav}.raw"
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# Replace any 00 bytes with 01 because 00 is the terminator for Ensoniq
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LC_ALL=C tr < tempSound.raw '\000' '\001' > "$rawFile"
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rm tempSound.raw
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# Null-terminate the waveform
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rawSize=`stat -f '%z' "$rawFile"`
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dd if=/dev/zero bs=1 count=1 >> "$rawFile"
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# Pad the file out to a wavetable page boundary
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rawSize=`stat -f '%z' "$rawFile"`
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pageSize=`echo "a=$rawSize; b=4096; if ( a%b ) (a/b+1)*4096 else a/b*4096" | bc`
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let "padding = $pageSize - $rawSize"
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dd if=/dev/zero bs=1 count="$padding" >> "$rawFile"
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# Concatenate to our soundbank
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cat "$rawFile" >> "SoundBank#060000"
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# Update the human-readable sound map (so human can modify loading code as needed)
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soundName="${waveFile%.wav}"
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printf "$%04x\t%s\t%d bytes\t%d Hz\n" "$currAddr" "$soundName" "$pageSize" "$rate" >> "Sound/SoundMap.txt"
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# Increment address for next sound in bank
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currAddr=$((currAddr+pageSize))
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done
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echo
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echo "Sound RAM mapping:"
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cat "Sound/SoundMap.txt"
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