The attenuation on the reverb tail is by design to avoid clipping. It is better to change the reverb preset values (sReverbPresets[]) in EffectReverb.cpp.
Thanks. Eric. On Aug 1, 8:05 pm, brian <brianbang.c...@gmail.com> wrote: > Hi All: > > I found the signal level will be dropped about -14dB after applied the > PresetReverb with "small room" while playing mp3 file. > > So, I enabled the LVM_PCM @ EffercReverb.h to record input/output pcm > data into SD card and compared the singal level of input and output. > > After studying the source code in ReverbBlock( ) @ LVREV_Process.c, it > will reserve 12dB > headroom before processing thereverbeffect > > Mult3s_32x16(pIn, > (LVM_INT16)LVREV_HEADROOM, > pTemp, > (LVM_INT16)NumSamples); > > But I can’t find the code which compensate the 12dB back. > I think it’s the reason why the signal level is dropped. > Now I compensate the 12dB back in the last of ReverBlock() > > /* Apply Gain*/ > Shift_Sat_v32xv32 (LVREV_OUTPUTGAIN_SHIFT, > pOutput, > pOutput, > size); > > Just change the definition of LVREV_OUTPUTGAIN_SHIFT from 5 to 7, and > it sounds great. > Is my patch right ? -- unsubscribe: android-porting+unsubscr...@googlegroups.com website: http://groups.google.com/group/android-porting
