Boilsoft M4A to AC3 Converter tutorial

Glossary:

M4A, widely used as a ringtone format, refers to MPEG-4 Part 14 or MP4 file format, formally ISO/IEC 14496-14:2003, is a multimedia container format standard specified as a part of MPEG-4. It is most commonly used to store digital video and digital audio streams, especially those defined by MPEG, but can also be used to store other data such as subtitles and still images. Like most modern container formats, MPEG-4 Part 14 allows streaming over the Internet. A separate hint track is used to include streaming information in the file. The official filename extension for MPEG-4 Part 14 files is .mp4, thus the container format is often referred to simply as MP4.

Dolby Digital AC-3 is the common version containing up to six discrete channels of sound. The most elaborate mode in common usage involves five channels for normal-range speakers (20 Hz – 20,000 Hz) (right front, center, left front, rear right, rear left) and one channel (20 Hz – 120 Hz allotted audio) for the subwoofer driven low-frequency effects. Mono and stereo modes are also supported. AC-3 supports audio sample-rates up to 48 kHz. Batman Returns was the first film to use Dolby Digital technology when it premiered in theaters in Summer 1992. The Laserdisc version of Clear and Present Danger featured the first Home theater Dolby Digital mix in 1995.

How to convert?

Step 1 Add video or audio formats

Press Add to add the M4A you want to convert, then select ac3 as the output format.

Step 2 Edit the file (Optional)

Press to play the files and the timer will start to work. Press to stop.

This feature is designed for you to measure your favorite segment.

When you want to designate the segment, you can press to set starting time and ending time.

Press to listen to the selected segment.

Step 3 Customize the audio (Optional)

As can be seen from the diagram, the panel allows you to set the expected volume and output format of the audio, and to customize the sample rate, Bit rate and channels the audio will contain.

Press to listen to the audio.

Step 4 Get your cool melody

When all settings are completed, just press Start Button to gain your favorite ac3 from your output directory soon.