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-rw-r--r--src/mame/drivers/tbowl.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/drivers/tbowl.cpp b/src/mame/drivers/tbowl.cpp
index 6a40aac2228..5e372595193 100644
--- a/src/mame/drivers/tbowl.cpp
+++ b/src/mame/drivers/tbowl.cpp
@@ -137,7 +137,7 @@ WRITE8_MEMBER(tbowl_state::adpcm_end_w)
WRITE8_MEMBER(tbowl_state::adpcm_vol_w)
{
msm5205_device *adpcm = (offset & 1) ? m_msm2 : m_msm1;
- adpcm->set_volume((data & 0x7f) * 100 / 0x7f);
+ adpcm->set_output_gain(ALL_OUTPUTS, (data & 127) / 127.0);
}
void tbowl_state::adpcm_int( msm5205_device *device, int num )