Ladies and Gentlemen,
I have an old Skype phone that I have used under Centos-6 that I have not
been able to get to work under Centos-7 and Centos-8. I have tested it
under Centos-6 (2.6.32-754.6.3.el6.i686 #1 SMP) with:
aplay -D usb-phone -t wav /usr/share/sounds/alsa/Front_Center.wav
and it works with voice output saying "Front Center".
When I try the same under Centos-7 (3.10.0-1062.9.1.el7.x86_64 #1 SMP)
and Centos-8 (4.18.0-80.11.2.el8_0.x86_64 #1 SMP), I get two short
rumbling segments of noise (That I suspect being the not properly
processed words from the sound file).
I have played the above command under Centos-7 and Centos-8 using the
default device to the primary audio system with success. I have also
compared the sound files and they are the same.
>From all the above I conclude that the problem lies somwhere between the
asound.conf file (which is the same) and the snd_usb_audio kernel module.
The alsa versions are from 1.1.0 (Centos-6) to 1.1.6 (Centos-8).
I append the asound.conf file (where /etc/alsa/pulse-default.conf is
vanilla and the same) and the --dump-hw-params output from aplay (which
again is the same in all cases).
If I have missed some information I will be glad to provide it.
Any advice would be appreciated. Thanks for any help, AG
--------------------------------------------------------------------------
#
# Place your global alsa-lib configuration here...
#
@hooks [
{
func load
files [
"/etc/alsa/pulse-default.conf"
]
errors false
}
]
# This is an alias for the phone
pcm.usb-audio {
type hw
card 1
device 0
}
# This creates a converting alias for the phone
pcm_slave.myslave {
pcm "hw:1,0"
format S16_LE
channels 1
rate 8000
}
pcm.usb-convert {
type plug
slave myslave
}
# The short version of the same thing
pcm.usb-phone {
type plug
slave {
pcm "hw:1,0"
format S16_LE
channels 1
rate 8000
}
}
--------------------------------------------------------------------------
--------------------------------------------------------------------------
HW Params of device "usb-phone":
--------------------
ACCESS: MMAP_INTERLEAVED MMAP_NONINTERLEAVED MMAP_COMPLEX RW_INTERLEAVED RW_NONINTERLEAVED
FORMAT: S8 U8 S16_LE S16_BE U16_LE U16_BE S24_LE S24_BE U24_LE U24_BE S32_LE S32_BE U32_LE U32_BE FLOAT_LE FLOAT_BE FLOAT64_LE FLOAT64_BE MU_LAW A_LAW IMA_ADPCM S24_3LE S24_3BE U24_3LE U24_3BE S20_3LE S20_3BE U20_3LE U20_3BE S18_3LE S18_3BE U18_3LE U18_3BE
SUBFORMAT: STD
SAMPLE_BITS: [4 64]
FRAME_BITS: [4 640000]
CHANNELS: [1 10000]
RATE: [4000 4294967295]
PERIOD_TIME: [4000 32768000]
PERIOD_SIZE: [16 4294967295]
PERIOD_BYTES: [8 4294967295]
PERIODS: (0 268435456)
BUFFER_TIME: [1 4294967295]
BUFFER_SIZE: [32 4294967294]
BUFFER_BYTES: [16 4294967295]
TICK_TIME: ALL
--------------------
--------------------------------------------------------------------------
----------------------------------------------------------------------
Alfred Ganz alfred-ganz:at:agci.com
AG Consulting (203) 624-9667
440 Prospect Street # 11
New Haven, CT 06511
----------------------------------------------------------------------
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