Line-In to MPA with River Past Audio Capture, Line-In2MPA recording

What is MPA?

There are three "layers" in the MPEG-1 Audio specification.

In MPEG Audio Layer-1, a simple 32-subband audio compressor using a floating point representation for subband samples. Resolution and scale factor are stored for groups of 12 subsamples. MP1 is only used for Philips DCC Digital Compact cassette with data rates of 384 kbps.

Both MPEG-1 and MPEG-2 files use MPEG-1 Audio Layer-2.

MPEG-1 Audio Layer-3 becomes the widely popular MP3.

MPEG.ORG is an excellent source for additional information on MPEG format and usage.

To encode MPEG Audio, you will need River Past MPEG-2 Booster Pack in addition to your audio software.

Launch River Past Audio Capture

Once River Past Audio Capture is installed properly, launch Audio Capture.

Set Sound Card Settings

Click on the toggle to the left of "Record from". The panel expands. Make sure the "Audio Device" combo box shows your sound card correctly, and select "Line in" in the "Port" combo box.

Different sound card may have different name for the line-in port.

Set Volume

Click on the toggle to the left of "Format". The panel expands. Select "AIF - Audio Interchanged File Format" as the File Type.

The "Volume" setting can be adjusted during the recording later.

Select Output Format

Use the setting panel on the bottom of the window to control the output format. Click on the toggle to the left of the "Format" label to expand the panel. Select "MPA - MPEG Audio" as the "Audio Type".

You can change the sample rate, channel (stereo or mono) and bitrate.

Note: To convert to MPEG audio, you must have River Past MPEG-2 Booster Pack installed.

Set Output File

Click on the toggle to the left of "Record to". The panel expands.

Click on the browse button to bring up the File Save dialog. enter the file name.

Record

Click the "Record" button to start recording.