Hyper Voice: Difference between revisions
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(Created page with "Hyper Voice is a headphone-only sample output channel introduced with the WonderSwan Color. It allows converting 8-bit signed and unsigned, mono and stereo samples into 16-bit signed PCM sent directly to the headphone output, after mixing with the traditional four channels. == I/O Ports == === Hyper Voice Left Output ($64, $65) === === Hyper Voice Right Output ($66, $67) === <pre> 15 bit 8 7 bit 0 ---- ---- ---- ---- ssss ssss ssss ssss ++++-++++--++++-++++...") |
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== I/O Ports == | == I/O Ports == | ||
{{Anchor|Hyper Voice Output}} | |||
=== Hyper Voice Left Output ($64, $65) === | === Hyper Voice Left Output ($64, $65) === | ||
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</pre> | </pre> | ||
Unlike the [[Sound]] output registers, these can be written to - allowing for direct 16-bit sample output. | Unlike the [[Sound]] sample output registers, these can be written to - allowing for direct 16-bit sample output. | ||
{{Anchor|Hyper Voice Input}} | |||
=== Hyper Voice Left Input ($68) === | === Hyper Voice Left Input ($68) === | ||
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These are typically written to by [[DMA|Sound DMA]], but can also be written to manually by the user. | These are typically written to by [[DMA|Sound DMA]], but can also be written to manually by the user. | ||
{{Anchor|Hyper Voice Control}} | |||
=== Hyper Voice Control ($6A, $6B) === | === Hyper Voice Control ($6A, $6B) === | ||
Revision as of 12:21, 22 August 2023
Hyper Voice is a headphone-only sample output channel introduced with the WonderSwan Color. It allows converting 8-bit signed and unsigned, mono and stereo samples into 16-bit signed PCM sent directly to the headphone output, after mixing with the traditional four channels.
I/O Ports
Hyper Voice Left Output ($64, $65)
Hyper Voice Right Output ($66, $67)
15 bit 8 7 bit 0 ---- ---- ---- ---- ssss ssss ssss ssss ++++-++++--++++-++++- Signed 16-bit sample.
Unlike the Sound sample output registers, these can be written to - allowing for direct 16-bit sample output.
Hyper Voice Left Input ($68)
Hyper Voice Right Input ($69)
7 bit 0 ---- ---- ssss ssss ++++-++++- 8-bit sample.
These are typically written to by Sound DMA, but can also be written to manually by the user.
Hyper Voice Control ($6A, $6B)
15 bit 0 7 bit 0
---- ---- ---- ----
.mmc .... errr ffss
||| |||| ||++- Shift/Volume:
||| |||| || 0 = 100% 1 = 50%
||| |||| || 2 = 25% 3 = 12.5%
||| |||| ++--- Input sample mode:
||| |||| 0 = Unsigned
||| |||| 1 = Unsigned, negate
||| |||| 2 = Signed
||| |||| 3 = Signed, ignore Shift/Volume
||| |+++------ Update sample rate/Divisor:
||| | 0 = 24000/1 = 24000 Hz
||| | 1 = 24000/2 = 12000 Hz
||| | 2 = 24000/3 = 8000 Hz
||| | 3 = 24000/4 = 6000 Hz
||| | 4 = 24000/5 = 4800 Hz
||| | 5 = 24000/6 = 4000 Hz
||| | 6 = 24000/8 = 3000 Hz
||| | 7 = 24000/12 = 2000 Hz
||| +--------- Enable: 0 = off, 1 = on
||+----------------- Input channel: 0 = left, 1 = right
++------------------ Channel mode:
0 = Stereo
1 = Mono, left channel only
2 = Mono, right channel only
3 = Mono, both channels
