How to hear sounds from line-in jack? (fwd)

[Linux for blind general discussion]

Thank you very much!

On Wed, 23 Nov 2022, Linux for blind general discussion wrote:

> Date: Wed, 23 Nov 2022 22:29:39 -1000
> From: Linux for blind general discussion <blinux-list at redhat.com>
> To: blinux-list at redhat.com
> Subject: Re: How to hear sounds from line-in jack? (fwd)
> 
>> ---------- Forwarded message ----------
>> Date: Wed, 23 Nov 2022 21:36:53 +0800 (CST)
>> From: 高生旺 <coscell at gmail.com>
>> To: slint at freelists.org
>> Subject: How to hear sounds from line-in jack?
>> 
>> Sounds from line-in can be recored, but how to hear them in time?
>> Which console command can be used for this purpose?
>
> Hi, 
>
> Not all sound cards are capable of simultaneous
> input and output (duplex operation.)
>
> Also, most distributions have pulseaudio installed
> as a layer of over ALSA. 
>
> One solution using ALSA (with PA disabled) would be
> using ecasound.
>
> ecasound -i alsa,default -o alsa,default
>
> You could also try alsahw,0 instead of
> alsa,default, or alsahw,1, etc. depending
> on the number of your sound card. You
> can also use the name.
>
> For details use `cat /proc/asound/cards`.
>
> Have fun,
>
> Joel
>
>
> -- 
> Joel Roth
>
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