"REC" Navi radio reads only a few MP3 files from a CD - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 3 (permalink) Old 06-09-2016, 05:14 PM Thread Starter
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Join Date: Aug 2015
Location: Slovakia, Europe
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Model year: 2007
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"REC" Navi radio reads only a few MP3 files from a CD

Hello, I have a 2007 Commander US version with stock navigation radio ("REC" unit) and I have the following problem:
When I insert a CD with MP3 files, it will display only about 20 first songs/files. It is always the same files and always the first ~20 songs (based on alphabet order). There is no issue playing these files, no skipping, buffering, etc. I don't think it has anything to do with the optical system in REC CD drive.

I tried to workaround it by using different burning settings, or creating more folders each with 20 files in it, but to no avail. According to the WKJeeps page, the unit should work with up to 255 files.

I don't even know where to start looking for a problem. Did anyone had an issue like this?
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post #2 of 3 (permalink) Old 06-10-2016, 09:03 AM
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I would try a new different brand of CD-R, to eliminate the CD-R media as a problem.


CD-R's use dye in a layer on the decal or coating on the opposite side. Its NOT the most stable technology, and problems often occur from low quality discs OR discs that have deteriorated over time or disc that have been exposed to extreme elements.


I have an aftermarket Head Unit in my Commander now, but in the past I had the RES radio that could read MP3/WAV files on CD-R and I had an aftermarket unit in my Neon R/T that could do the same. I would leave a CD-R loaded with songs in the radios to use whenever I wanted. I couldn't get a CD-R to last more than a year, the hot/cold extremes the car goes through disrupts the dye patterns in CD-R. I had to throw them out and make a new one.

I don't know if that is your problem, but its a possibility. Perhaps the box of CD-R's you're using to make your CD's loaded with songs had been left out in the sun during shipping and are bad. Get a new, quality, CD-R and burn a CD and see if that works.


If NOT.......
Look up the data about media for the stereo, there may be only certain encoding formats the stereo can read.
e.g. you may have only 20 songs encoded in MP3 at 160Kbs and the rest encoded at 320Kbs, the stereo can only read and play songs recorded at 160Kbs or lower, that is why it only read those songs and NOT the others.


A lot of video files won't work on my Pioneer head unit, I looked up in the manual about media formats and files, and the video files have to be under a certain resolution and sample rate, etc....
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post #3 of 3 (permalink) Old 06-12-2016, 06:23 PM Thread Starter
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Join Date: Aug 2015
Location: Slovakia, Europe
Own a Commander?: Yes
Model year: 2007
Trim Package: Overland
Power-Train: 5.7L V-8 Hemi
4WD
If 4WD - system: QD-II
Current Mileage: ~81 000 miles (130 000 km)
Posts: 15
Well, I thought this could not be the problem but gave it a shot today. I wen to a store and purchased various CD-R brands, namely: TDK, TDK for Audio, Sony, Extreme, Esperanza. I hadn't even heard of the last two brands before I bought these.

I used a different DVD-RW drive (in an old laptop) and also burned several CDs using different applications, speeds and settings:
Esperanza CD-R: 16x speed, InfraRecorder, Disk-at-Once
Sony CD-R: 16x speed, InfraRecorder, Disk-at-Once
Extreme CD-R: 10x speed, CDBurnerXP, Track-at-Once

Magically, the navigation radio now reads all MP3 files correctly and on all three CDs, even those wanna-be brands (Extreme, Esperanza). There is no delay accessing the CD or skipping tracks. Possible explanation for this is:
Previous CDs are bad or just not a good match to the REC radio (I find this unlikely as they were Verbatim CD-R which are a quite good quality).
Previous DVD-RW drive was not a good match for the REC radio (this might be the case).

There is no mechanical fault or any other shenanigans. I will re-burn all the CDs with the same DVD-RW drive (it seems CD-R brand and burn settings do not affect the outcome). So, good call on this. Thanks for making me go to shop and try this, finally.
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