[Cin] offtopic: Digitize and record Audio via Line-In Jack or via USB adapter?

[Terje J. Hanssen]

I'm travelling some days, so sorry I have to wait a week to practically
follow up the replies.

I have speakers connected to the back panel audio ports and possibly also a
mic.
In the meantime thanks for the received suggestion and detailed
information.

What is really the "A/D converter" using analog ports in comparision with
an usb A/D adapter?

Terje


tor. 23. sep. 2021, 09:34 skrev mat via Cin <cin at lists.cinelerra-gg.org>:

> Your MSI Z170-A PRO motherboard has according to specs a Realtec AL892
> audio chip. The input converters should have 90 dB S/N (signal-to-
> noise) ratio (A-weighted), but of course the motherboard might make it
> a little worse.
> However, from you record player of tape you will be very lucky to get
> better than 65 dB S/N. So if an A-D converter has a S/N of 70 dB or
> better, it is more than good enough for this.
>
> Regarding your PC input channels, on current desktop motherboards I
> usually see three 3.5 mm mini-jacks. Their recording quality for line-
> in is close to 90 dB S/N or even above 100 on the better ones.
>
> In pavucontrol (audio mixer), first check the configuration tab, to see
> if the Built-in Audio is set up correctly. "Analog stereo duplex" is
> probably right.
> Then, on the "Input devices" tab, at the bottom set it to show
> "Hardware Input Devices", then check that the Port is set to the
> correct port. For me, "Line In" shows correctly if something is plugged
> in or not. Make also sure the gain is set to 100%.
> That said, I sometimes have problems recording LineIn with Audacity,
> even though all seems OK. have not yet determined what the cause is.
>
> External USB sound cards can be quite good, if you stay away from the
> very cheap ones that are mic/phone only. I have a Behringer UCA-202
> which is good enough for this, but there are much better ones (at a
> price), look at music-oriented webshops. I presume to have an RIAA pre-
> amp for you record player, these are usually set up for less output
> that typical PC or usb-audio input, which expect 1 Volt. Drivers are
> not needed, and disregard any reviews that don't show measurements.
>
> MatN
>
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