[参考译文] TLV320AIC3254-Q1：在音乐播放和暂停之间切换时会触发噼啪噪声

您好！

您如何定义您的音乐播放和暂停？ 需要记住的一点是、如果数字音频从非零值变为零("暂停")而没有斜降、那么总是会出现爆裂声。

我看到在你的脚本中,你在结束时取消静音,然后将音量设置得稍高,这也可能会导致爆裂声? 您是否可以将音量设置更改为静音之前的音量设置？ 不过、我认为您可能不需要将器件静音、而是需要在音频上实现几毫秒的斜降/升操作、以便实现理想的弹出控制。 即使启用了软步进、这也不包括静音和取消静音之间的软步进、而只是包括不同的音量级别。 如果在-63dB 和0dB 之间切换、则不会有噼啪声、但我看到您的系统设置为-63dB、取消静音、然后设置为-42dB。 删除系统中的静音也可能对弹出有所帮助。 如果您在这方面需要更多帮助、请告诉我。

在此处附加注释脚本以供将来参考：

/* pause to play */
00 00 #page 0
40 10 #dac auto muted if input si dc for more than 100 samps, left and right dac not muted, independent volume control

/* play to pause */
00 00 
40 1C #left channel and right muted. 

/* 1st play */
00 00 
01 01 #software reset

00 00 
1B 00 #i2s, 16 bit, slave mode

00 00 
04 07 #pll input=bclk, pll clock is codec_clkin
06 14 #J=20
07 00 #D = 0
08 00 #D = 0
05 93 #pll powered up, P=1, R=3
0B 85 #NDAC powered up, ndac=5
0C 83 #MDAC powered up, mdac = 3
0D 00 #DOSR msb = 0
0E 80 #DOSR = 128

00 01 #page 1
01 08 #disable weak connection of avdd with dvdd
02 01 #avdd ldo powered up
47 32 #analog inputs power up time is 6.4ms
7B 01 #reference will power up in 40ms when analog blocks are powered up

00 00 #page 0
3C 02 #minidsp a and d are independently powered up, PRB_P2

00 2C #page 0x2c
01 04 #adaptive filtering enabled for DAC

00 01 #page 1
0E 08 #left channel dac reconstruction filter output is routed to LOL
0F 08 #right channel dac reconstruction filter is routed to LOR
12 03 #lol not muted, gain=3dB
13 03 #lor not muted, gain=3dB
09 0C #HPL and HPR powered down, LOL and LOR powered up, MAL and MAR powered down

00 00 #Page 0
3F D4 #left and right dac channel powered up, left is left and right is right, soft stepping is 1 step per dac wclk
40 1C #auto mute at 100, left dac and right dac muted

00 00 #page 0
41 82 #left DAC digital volume = -63dB
42 82 #right DAC dig volume = -63dB

00 00 #page 0
40 10 #left dac and right dac not muted

00 00 #page 0
41 D6 #left DAC to 1101 0110 - this is a negative number, -42 which corresponds to -21dB
42 D6 #same for right DAC

此致！
MIR