From 4069f1d054366a4a66f5611eb4bf1de0d0813796 Mon Sep 17 00:00:00 2001 From: cam900 Date: Sun, 28 Oct 2018 12:24:57 +0900 Subject: [PATCH] c6280.cpp : Fix LFO scale bit --- src/devices/sound/c6280.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/devices/sound/c6280.cpp b/src/devices/sound/c6280.cpp index 647a7e5f4cb..0e5873c86de 100644 --- a/src/devices/sound/c6280.cpp +++ b/src/devices/sound/c6280.cpp @@ -134,7 +134,7 @@ void c6280_device::sound_stream_update(sound_stream &stream, stream_sample_t **i m_channel[1].m_counter &= 0x1FFFF; lfo_data = m_channel[1].m_waveform[lfooffset]; if (m_lfo_control & 3) - step += ((lfo_data - 16) << ((m_lfo_control-1)<<1)); // verified from patent, TODO : same in real hardware? + step += ((lfo_data - 16) << (((m_lfo_control & 3)-1)<<1)); // verified from patent, TODO : same in real hardware? offset = (m_channel[0].m_counter >> 12) & 0x1F; m_channel[0].m_counter += m_wave_freq_tab[step & 0xfff];