Audio quality direct recording

Joenco · Jun 16, 2004, 03:30 AM

Hello all,

As found in the docs

... Direct SPDIF recording drammatically improves the recording quality of digital sources when the main goal is to make an 'exact' copy of the digital signal. The improvements include better frequency response and intermodulation. In the present implementation Direct SPDIF ....

Now my question.

I can record in two ways.

1. Using Asio -----> without direct recording
2. Using MME and SPDIF -----> with direct recording

I expected to hear a drammatically improved audio quality using direct recording but I can not hear it.
Maybe I'm doing something wrong.
How can I measure this?
Any tips?

Thank you,

Doomsayer · Jun 16, 2004, 08:15 AM

You'll be able to hear it (probably) only on some very high quality speakers. You can also try measuring it with RMAA.

Joenco · Jun 17, 2004, 10:16 AM

Can you please elaborate a bit on RMAA. How should I do this?

TravelRec. · Jun 17, 2004, 01:38 PM

Hi!

Search the web for "Rightmark Audio Analyzer", it´s a free tool to test audio equipment including the soundcard itself. Help files for using the tool are also there.

The direct recording mechanism bypasses the DSP so no resampling is applied in the signal path. If you have good headphones and you make a clean copy of say, a CD-track over SPDIF with and without direct recording, then you may hear a very fine difference, resulting of lower distortion and some less noise and harmonics.

Greetings!

TravelRec.

Jun 16, 2004, 03:30 AM	#1
Joenco DriverHeaven Junior Member Join Date: Aug 2003 Posts: 37 Rep Power: 0	Audio quality direct recording Hello all, As found in the docs ... Direct SPDIF recording drammatically improves the recording quality of digital sources when the main goal is to make an 'exact' copy of the digital signal. The improvements include better frequency response and intermodulation. In the present implementation Direct SPDIF .... Now my question. I can record in two ways. 1. Using Asio -----> without direct recording 2. Using MME and SPDIF -----> with direct recording I expected to hear a drammatically improved audio quality using direct recording but I can not hear it. Maybe I'm doing something wrong. How can I measure this? Any tips? Thank you,

Jun 17, 2004, 01:38 PM	#4
TravelRec. Alternative Audioproductions Join Date: Sep 2003 Location: Germany / Sachsen-Anhalt Posts: 1,704 Rep Power: 42	Hi! Search the web for "Rightmark Audio Analyzer", it´s a free tool to test audio equipment including the soundcard itself. Help files for using the tool are also there. The direct recording mechanism bypasses the DSP so no resampling is applied in the signal path. If you have good headphones and you make a clean copy of say, a CD-track over SPDIF with and without direct recording, then you may hear a very fine difference, resulting of lower distortion and some less noise and harmonics. Greetings! TravelRec. __________________ Always take a look behind.

Jun 16, 2004, 08:15 AM	#2
Doomsayer DriverHeaven Lover Join Date: Feb 2004 Location: Latvia Posts: 154 Rep Power: 0	You'll be able to hear it (probably) only on some very high quality speakers. You can also try measuring it with RMAA.

Jun 17, 2004, 10:16 AM	#3
Joenco DriverHeaven Junior Member Join Date: Aug 2003 Posts: 37 Rep Power: 0	Can you please elaborate a bit on RMAA. How should I do this?