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Monkey's Audio
Monkey's Audio (also called APE or MAC) is a lossless compression format. The home page is
Monkey's probably has the highest compression of all the lossless codecs, but it comes at a price - decoding is very CPU intensive, and not all compression levels are playable in realtime in Rockbox.
Monkey's audio has five compression modes, with each mode compressing to a smaller size, but significantly slower to decode than the previous one. -c2000 or -c3000 are a good compromise between compression size and decoding speed.
-c1000 - "fast"
-c2000 - "normal"
-c3000 - "high"
-c4000 - "extra high"
-c5000 - "insane"
In addition, Monkey's Audio (currently at version 3.99) has been through many incompatible format changes in its life - most versions of the encoder produce files which are not decodable by earlier versions of the decoder.
Current Status
The Rockbox Monkey's Audio codec only supports v3.97 or later files.
Rockbox supports APEv2 tags in Monkey's Audio files, but does not read (or skip) id3v2 tags, which some applications also add to APE files. If a file has an id3v2 tag, it won't work in Rockbox.
Performance
The codec has already been optimised a lot. There's some further potential by using both CPU cores on
targets. Approximate decoding speed for v3.99 files on the various CPUs in Rockbox-supported DAPs are as follows (figures for 44.1kHz 16 bit stereo files):
iPod 1st Gen..3rd Gen (80MHz ARM7TDMI: )
iPod 4th Gen, Mini 1st G Iriver H10; m:robe 100 (80MHz ARM7TDMI: )
iPod 5th Gen, Mini 2nd Gen, Nano 1st G Sansa c200, e200 (80MHz ARM7TDMI: /)
Iriver H1x0/H300, iAudio X5/M5/M3 (124 MHz
iPod Nano 2nd Gen (192MHz ARM940T: S5L8701)
Cowon D2 (192MHz ARM926EJ-S: TCC7801)
Gigabeat F (300MHz ARM920T: S3C2440)
Gigabeat S (528MHz ARM1136JF-S: i.MX31L)
Sansa Clip (250MHz ARM9TDMI: AS3525)
Sansa Clipv2 (250MHz ARM926EJ-S: AS3525v2)
starting with r24512, tests are done using the .Differences to earlier tests are minimal (&1% relative).
filter buffer(s) taken out of IRAM in favour of a larger reciprocal table for optimised division.
insane filter buffer does not fit into IRAM.
Note that a speed somewhat above 100% is required to play without skipping during normal use.
: Monkey's Audio (APE)Malwarebytes' Anti-Malware is considered to be the next step in the detection and removal of malware. In our product we have compiled a number of new technologies that are designed to quickly detect, destroy, and prevent malware. Malwarebytes' Anti-Malware can detect and remove malware that even the most well known anti-virus and anti-malware applications fail to detect. Malwarebytes' Anti-Malware monitors every process and stops malicious processes before they even start. The Realtime Protection Module uses our advanced heuristic scanning technology which monitors your system to keep it safe and secure. In addition, we have implemented a threats center which will allow you to keep up to date with the latest malware threats.
Changes in 2.2.1:Improvements:Context Menu scanning option is now enabled by default. Note if you had this option disabled previously and want to retain that setting, you must disable again manually this one time only. Future updates will retain the setting properlyImproved renewal experience for those who purchased in retail store so that the original license key is retained post-renewal instead of requiring that a new key be entered and activatedImproved End of Trial experience so it is clear that trial has expired and real-time protection is no longer availableAdded additional license checks to ensure subscription details are updated as quickly as possible after a renewal is processedUpdated company and product logos with new logoFor Premium subscription licenses, removed Renew button from My Account screen to avoid confusion over license termIssues Fixed:Fixed security vulnerability to ensure database updates are downloaded over SSL connections onlyFixed crash that occurred if Dell Backup and Recovery software was installed on same systemFixed issue where scheduled scan did not honor weekly recurrence properlyFixed issue where license expiration notices were incorrectly displaying multiple times in rapid successionFixed issue where the Scheduler would continue to run in certain cases after a trial had expiredFixed issue where the update progress bar on the Dashboard would appear to hang and would never completeSeveral improvements to Chameleon self-protection
(reported not working)
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