rk3308 ubuntu固件声卡问题

moontiger

--------------------------------------- device #0
Name                        = rockchip,rk3308b-acodec: - (hw:0,0)
Host API                    = ALSA
Max inputs = 1, Max outputs = 1
Default low input latency   =   0.0020
Default low output latency  =   0.0020
Default high input latency  =   0.0080
Default high output latency =   0.0080
Default sample rate         = 192000.00
Supported standard sample rates
for half-duplex 16 bit 1 channel input =
None
Supported standard sample rates
for half-duplex 16 bit 1 channel output =
None
Supported standard sample rates
for full-duplex 16 bit 1 channel input, 1 channel output =
None
--------------------------------------- device #1
Name                        = Loopback: PCM (hw:7,0)
Host API                    = ALSA
Max inputs = 1, Max outputs = 1
Default low input latency   =   0.0020
Default low output latency  =   0.0020
Default high input latency  =   0.0080
Default high output latency =   0.0080
Default sample rate         = 192000.00
Supported standard sample rates
for half-duplex 16 bit 1 channel input =
None
Supported standard sample rates
for half-duplex 16 bit 1 channel output =
None
Supported standard sample rates
for full-duplex 16 bit 1 channel input, 1 channel output =
None
--------------------------------------- device #2
Name                        = Loopback: PCM (hw:7,1)
这个是我按照教程做出的ubuntu系统Minimal固件 portaudio的读取上来的声卡信息，看着就有问题，全是1通道192k的。arecord可以录音但是alsa和portaudio打不开声卡设备
下面是声卡信息


Host API                    = ALSA
Max inputs = 1, Max outputs = 1
Default low input latency   =   0.0020
Default low output latency  =   0.0020
Default high input latency  =   0.0080
Default high output latency =   0.0080
Default sample rate         = 192000.00
Supported standard sample rates
for half-duplex 16 bit 1 channel input =
None
Supported standard sample rates
for half-duplex 16 bit 1 channel output =
None
Supported standard sample rates
for full-duplex 16 bit 1 channel input, 1 channel output =
None
--------------------------------------- device #3
Name                        = sysdefault
Host API