Line-In to AIF with River Past Audio Capture, Line-In2AIF recording

What is AIF?

Short for Audio Interchange File Format, a common format for storing and transmitting sampled sound. The format was developed by Apple Computer and is the standard audio format for Macintosh computers. It is also used by Silicon Graphics Incorporated (SGI).

The AIFF format is uncompressed so AIFF files tend to be large. However, there is another format called AIFF-Compressed (AIFF-C or AIFC) that supports compression ratios as high as 6:1.

AIFF files generally end with an .AIF or .IEF extension.

AIFC files generally end with an .AIFC extension.

AIFF and AIFC are standard audio format used on MacOS systems. AIFF is not compressed. AIFC is compressed.

To encode AIF audio, please make sure Apple QuickTime is installed.

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 "AIF - Audio Interchanged File Format" as the "Audio Type".

You can change the compressor, and depending on the compressor, you can change the sample rate, channel (stereo or mono), bits/sample, and bitrate.

When "16 bit LPCM" or "16 bit PCM" is selected as the "Compressor", the file is uncompressed, and satisfy the original AIFF specification. When other compressors are used, the file is compressed and is considered to be an AIFC file.

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.