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-rw-r--r--libopna/opnassg.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/libopna/opnassg.h b/libopna/opnassg.h
index 1bd607a..8a59d91 100644
--- a/libopna/opnassg.h
+++ b/libopna/opnassg.h
@@ -53,6 +53,7 @@ void opna_ssg_writereg(struct opna_ssg *ssg, unsigned reg, unsigned val);
unsigned opna_ssg_readreg(const struct opna_ssg *ssg, unsigned reg);
// channel level (0 - 31)
int opna_ssg_channel_level(const struct opna_ssg *ssg, int ch);
+unsigned opna_ssg_tone_period(const struct opna_ssg *ssg, int ch);
#ifdef __cplusplus
}