spk_ttyio_out
static int spk_ttyio_out(struct spk_synth *in_synth, const char ch);
.synth_out = spk_ttyio_out,
ret = spk_ttyio_out(in_synth, ch);
ret = spk_ttyio_out(in_synth, 0xc0 | (ch >> 6));
ret &= spk_ttyio_out(in_synth, 0x80 | (ch & 0x3f));
ret = spk_ttyio_out(in_synth, 0xe0 | (ch >> 12));
ret &= spk_ttyio_out(in_synth, 0x80 | ((ch >> 6) & 0x3f));
ret &= spk_ttyio_out(in_synth, 0x80 | (ch & 0x3f));