The peak is always flattened

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The peak is always flattened

Permanent link to this post Posted by cuteluluc » Mon Jul 17, 2017 9:56 am

Hello All,
I use TASCAM US-366 to record, but the peak is always flattened.
Change the volume of Mic doesn't effect the recording.
How could I make it not flattened?

OS: Windows 10
Audacity Version: 2.1.3
Recording Equipment: TASCAM US-366
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Re: The peak is always flattened

Permanent link to this post Posted by cuteluluc » Mon Jul 17, 2017 11:30 am

cuteluluc wrote:Hello All,
I use TASCAM US-366 to record, but the peak is always flattened.
Change the volume of Mic doesn't effect the recording.
How could I make it not flattened?

OS: Windows 10
Audacity Version: 2.1.3
Recording Equipment: TASCAM US-366


By the way, use TASCAM US-366 with MAC Audacity Version can't find this problem.
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Re: The peak is always flattened

Permanent link to this post Posted by steve » Mon Jul 17, 2017 12:00 pm

You appear to be overloading something somewhere.
Where is the input signal into the TASCAM coming from?
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Re: The peak is always flattened

Permanent link to this post Posted by cuteluluc » Mon Jul 17, 2017 1:16 pm

TASCAM US-366
Sample width : 24bits
Sample rate: 48 kHz
Sample Clock Source: Digital Input
Digital Input : Coaxial
Digital Input Status: valid 48 kHz
I/O select: Input
Mode : Stereo Mix
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Re: The peak is always flattened

Permanent link to this post Posted by steve » Mon Jul 17, 2017 1:24 pm

What goes into the TASCAM US-366? Where does that strange triangular waveform originate?
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Re: The peak is always flattened

Permanent link to this post Posted by cuteluluc » Mon Jul 17, 2017 1:38 pm

What goes into the TASCAM US-366? <- TV SPDIF audio digital signal
Where does that strange triangular waveform originate? <- That is a test pattern to test Aggregate Reset and Play Latency.
We use TASCAM US-366 with Audacity MAC version, and the peak is not flattened.
Should we change the Preferences of Audacity Windows version?

Edit > Preferences
In Audacity, change the 'Project Rate (Hz)' to 48000. This setting is located in the bottom left corner of the application.
In Audacity, change the input to the SPDIF endpoint from the pull-down menu on the right of the microphone icon in the upper right side of the application.
In Audacity, open the Preferences (Edit > Preferences > Spectrograms) and enter the following values:
'Window size' set to 4096
'Window type' set to Hanning
'Minimum Frequency (Hz)' set to 0
'Maximum Frequency (Hz)' set to 24000
'Gain (dB)' set to 0
'Range (dB)' set to 96
'Frequency gain (dB/dec)' set to 0
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Re: The peak is always flattened

Permanent link to this post Posted by DVDdoug » Mon Jul 17, 2017 1:58 pm

Mode : Stereo Mix
That could be the issue. Try recording directly from the digital input or the microphones.
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Re: The peak is always flattened

Permanent link to this post Posted by cuteluluc » Mon Jul 17, 2017 3:33 pm

Mode : Stereo Mix
Use same mode in audacity MAC version is OK, but in windows version is flattened.
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Re: The peak is always flattened

Permanent link to this post Posted by steve » Mon Jul 17, 2017 3:40 pm

Mac does not have "Stereo Mix".
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Re: The peak is always flattened

Permanent link to this post Posted by cuteluluc » Tue Jul 18, 2017 10:00 am

Hi Steve,
TASCAM US-366 only has two Mode: Multi-track / Stereo Mix and it can't disable.
Usually we use Multi-track mode for MAC, and Stereo Mix for Windows.
Multi-track mode for MAC is normal.
Stereo Mix for Windows has peak flattened problem.
We also try that Multi-track mode for Windows can't get waveform.
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