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<div><span></span>Hi </div><div><br></div><div>I so sorry that I sent a lot of mails these days. Now I summarize all the problems in this mail.</div><div><br></div><div>Device: IMX6DL </div><div>Kernel: 4.1.15</div><div>Environment: pulseaudio 8.0, alsa( alsactl -v : 1.1.0)</div><div><br></div><div>Reason: </div><div><span style="color: rgb(0, 0, 0); font-size: 10.5pt; line-height: 1.5; background-color: rgba(0, 0, 0, 0);"> </span>I used "mplayer" to play audio file in "system()" before (didn't open pulseaudio). </div><div><span style="color: rgb(0, 0, 0); font-size: 10.5pt; line-height: 1.5; background-color: rgba(0, 0, 0, 0);"> </span>I want to optimized that so I use Qt function(based on pulseaudio).</div><div><span style="color: rgb(0, 0, 0); font-size: 10.5pt; line-height: 1.5; background-color: rgba(0, 0, 0, 0);"> </span>After I changed configuration to let the pulseaudio start when the system startup and I play audio with Qt, I found the volume was mismatch when I changed it in Qt function</div><div><span style="color: rgb(0, 0, 0); background-color: rgba(0, 0, 0, 0);"> (*QSoundEffect::setVolume(), range:0.0 ~ 1.0, if volume is bigger than 0.1, the voice would be biggest)</span></div><div><span style="color: rgb(0, 0, 0); background-color: rgba(0, 0, 0, 0);"> So I used "mplayer -af volume=[-20, -10, 0, 10] XXX.wav" to test again, then I found if the volume is bigger than -10, the voice would be biggest.</span></div><div><span style="color: rgb(0, 0, 0); background-color: rgba(0, 0, 0, 0);"><br></span></div><div><span style="color: rgb(0, 0, 0); background-color: rgba(0, 0, 0, 0);"> I can</span><span style="font-family: 'Microsoft YaHei UI', Tahoma; line-height: normal; font-size: 10.5pt; background-color: transparent;"> attach the output of "paplay -v test.wav",but "</span><span style="font-family: 'Microsoft YaHei UI', Tahoma; line-height: normal;">aplay -Dplughw:0,0 test.wav</span><span style="font-family: 'Microsoft YaHei UI', Tahoma; line-height: normal; font-size: 10.5pt; background-color: transparent;">" just has a short "bit" voice either pulseaudio is opened or not.</span></div><div><span style="color: rgb(0, 0, 0); background-color: rgba(0, 0, 0, 0);"><br></span></div><div>I hope you can give me a hand again</div><div><span style="color: rgb(0, 0, 0); background-color: rgba(0, 0, 0, 0);">PS: I also send a mail to alsa-user, you can follow it : </span><span style="background-color: transparent;">https://sourceforge.net/p/alsa/mailman/message/37005410/</span></div>
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<div><span><div style="MARGIN: 10px; FONT-FAMILY: verdana; FONT-SIZE: 10pt"><div><span style="font-size: 10pt; line-height: 1.5; background-color: transparent;">Best Regards</span></div><div><span style="font-size: 10pt; line-height: 1.5; background-color: transparent;">Mihan</span></div></div></span></div>
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