Convert ALAC to AMR
Total Audio MP3 Converter converts ALAC files to AMR format.
The software is an all in one audio converter that supports more than 90 audio
and video files as input, and converts to popular formats such as MP3, WAV, AAC,
M4A, OGG, WMA, and AMR.
Total Audio MP3 Converter also supports batch conversion, and is full compatible
with Vista and Windows
- Free Download
Total Audio MP3 Converter here and then install the software
- Launch Total Audio MP3 Converter
- Choose ALAC Files
Click "Add Files" to choose ALAC files and then add them to conversion
Choose one or more ALAC files you want to convert and then click Open.
- Choose "to AMR"
- Convert ALAC to AMR
Click button "Convert" to convert all ALAC files to AMR format.
The software is converting ALAC files to AMR format.
- Play & Browse
When conversion completes, you could right-click converted item and choose "Play
Destination" to play the destination file; or choose "Browse Destination
Folder" to open Windows Explorer to browse the destination file.
What is ALAC?
Apple Lossless (also known as Apple Lossless Encoder, ALE, or Apple Lossless Audio
Codec, ALAC) is an audio codec developed by Apple Inc. for lossless data compression
of digital music.
Apple Lossless data is stored within an MP4 container with the filename extension
.m4a. It is not a variant of AAC, but uses linear prediction similar to other
lossless codecs such as FLAC and Shorten. iPod players with a dock connector (not
the Shuffle) and recent firmware can play Apple Lossless-encoded files. It does
not utilize any digital rights management (DRM) scheme, but by the nature of the
container, it is thought that DRM can be applied to ALAC much the same way it
can with other files in QuickTime containers.
What is AMR?
Adaptive Multi-Rate (AMR) is an audio data compression scheme optimized for speech
coding. AMR was adopted as the standard speech codec by 3GPP in October 1998 and
is now widely used in GSM and UMTS. It uses link adaptation to select from one
of eight different bit rates based on link conditions. AMR is also a file format
for storing spoken audio using the AMR codec. Many modern mobile telephone handsets
will allow you to store short recordings in the AMR format. There also exists
another storage format for AMR that is suitable for applications with more advanced
demands on the storage format, like random access or synchronization with video.
This format is the 3GPP-specified 3GP container format based on ISO base media
- Sampling frequency 8 kHz/13-bit (160 samples for 20 ms frames), filtered to
- The AMR codec uses eight source codecs with bit-rates of 12.2, 10.2, 7.95,
7.40, 6.70, 5.90, 5.15 and 4.75 kbit/s.
- Generates frame length of 95, 103, 118, 134, 148, 159, 204, or 244 bits for
bit rates 4.75, 5.15, 5.90, 6.70, 7.40, 7.95, 10.2, or 12.2 kbit/s, respectively
- AMR utilizes Discontinuous Transmission (DTX), with Voice Activity Detection
(VAD) and Comfort Noise Generation (CNG) to reduce bandwidth usage during silence
- Algorithmic delay is 20 ms per frame. For bit-rates of 12.2, there is no 'algorithm'
look-ahead delay. For other rates, look-ahead delay is 5 ms. Note that there is
5 ms 'dummy' look-ahead delay, to allow seamless frame-wise mode switching with
the rest of rates.
- AMR is a hybrid speech coder which uses Algebraic Code Excited Linear Prediction
- The complexity of the algorithm is rated at 5, using a relative scale where
G.711 is 1 and G.729a is 15.
- PSQM testing under ideal conditions yields Mean Opinion Scores of 4.14 for
AMR (12.2 kbit/s), compared to 4.45 for G.711 (u-law)
- PSQM testing under network stress yields Mean Opinion Scores of 3.79 for AMR
(12.2 kbit/s), compared to 4.13 for G.711 (u-law)
Convert ALAC to AMR Related Topics:
RPL to AMR,
3G2 to AMR,
VMD to AMR,
DV to AMR,
XM to AMR,
AVI to AMR,
DIF to AMR,
QCP to AMR,
3GPP to AMR,
ALAW to AMR,
MTM to AMR,
OGM to AMR,
WV to AMR,
MPA to AMR,
SDP to AMR,
IT to AMR,
GXF to AMR,
AC3 to AMR,
3GP to AMR,
AU to AMR,
OGA to AMR,
NSA to AMR,
OMA to AMR,
SND to AMR,
MPGA to AMR,
GSM to AMR,
SWF to AMR,
AMR to MP4,
NUT to AMR,
M2A to AMR,
MLP to AMR,
WMA to AMR,
VQF to AMR,
W64 to AMR,
CD to AMR,
SHN to AMR,
ASF to AMR,
MTS to AMR,
MVI to AMR