Axim X51V Rom A12.
Processor speed is set to auto.
When playing mp3's the speed is listed as 624 MHz.
IF I set it to battery save, the indicated speed drops
to 208MHz. Mp3's still play just fine.
I haven't figured out how to measure battery drain without
risking breaking off the battery connector pins.
Anybody know if I'm gonna increase battery life
when playing mp3's by
manually setting the speed to battery save mode?
What player are you using? TCPMP set the CPU speed down to about 208MHz when playing MP3's, and PocketPlayer 3 runs the CPU at about 312MHz or so if you're not using A2DP. I'd suggest switching MP3 player software and seeing if that fixes your issue - also see what else's running in the background. If you installed the A2DP fix that someone posted on the forums here, all that does is run a program that keeps your CPU at full power (624MHz) to keep A2DP from skipping.
Honestly, I wouldn't say that WMA SAVES CPU cycles - they're smaller, but that also means you spend a bit more time (CPU time) decoding.
Thanks,
I'm using TCPMP. The speed indication comes out of the windows
power management screen.
There are so many variables that it's hard to tell.
And if it doesn't show up in the task manager, I can't tell.
I reset it and tried again. When it's in the cradle, I get the
same symptom. Out of the cradle, the speed drops as I expect
on AUTO. Maybe I just got confused and did the test in the
cradle before. Don't suppose I have to sweat it when it's
on AC power.
WMA is out of the question. I ain't gonna recode my library.
Honestly, I wouldn't say that WMA SAVES CPU cycles - they're smaller, but that also means you spend a bit more time (CPU time) decoding.
Yes it does I've experiemented with it before, all the times I used wma the speed NEVER went above 312mhz whereas with .mp3 the lowest it went was 416mhz,sure it only uses 2 more minutes on the pc to convert but its worth it and ull be able to fit more files.
Low bitrate WMA sounds plenty fine for a mobile device. Motorcycle engine
drowns out most of the fidelity anyway.
Looks good until you do the math. 2 gigabytes holds about a
thousand WMA songs. 2-minutes each to convert is 2000 minutes
divided by 60 is 33 hours EVERY time I load the card.
Went thru that experiment with ogg and again with Sony minidisc ATRAC.
Ain't gonna happen.
mp3 is my story and I'm stickin' to it.
mike
>Yes it does I've experiemented with it before, all the times I used wma the speed
>NEVER went above 312mhz whereas with .mp3 the lowest it went was
>416mhz,sure it only uses 2 more minutes on the pc to convert but its worth it and
>u'll be able to fit more files.
>Yes it does I've experiemented with it before, all the times I used wma the speed
>NEVER went above 312mhz whereas with .mp3 the lowest it went was
>416mhz,sure it only uses 2 more minutes on the pc to convert but its worth it and
>u'll be able to fit more files.
Not convinced about WMA using less clock cycles -- my MP3 player uses 1/3 more battery on WMA than MP3.
If you're using a third more battery power, that probably means the CPU's doing more work. I know that the WirelessMMX Technology in the PXA270 has instructions to help with MP3 decoding, just as the Intel 2700g chipset has instructions to help with MPEG4 (DivX and WMV) decoding... but I don't know if it has instructions for WMA decoding - which would mean, if it has to do all those calculations manually, that even if the CPU speed is low, that it'd be putting in more time into doing the maths... which would mean less battery life for you.
What player are you using again? WMP? PocketPlayer treats WMA and MP3 files the same, CPU speed setting wise, just as it did for Duwenbasden... but from what I recall, the lower bitrates for an equivalent sound quality were only possible because your CPU spent more time doing the decoding in the first place, just as h.264 provides better video quality at the same bitrate than DivX at the expense of more CPU usage.
Low bitrate WMA sounds plenty fine for a mobile device. Motorcycle engine
drowns out most of the fidelity anyway.
Looks good until you do the math. 2 gigabytes holds about a
thousand WMA songs. 2-minutes each to convert is 2000 minutes
divided by 60 is 33 hours EVERY time I load the card.
Went thru that experiment with ogg and again with Sony minidisc ATRAC.
Ain't gonna happen.
mp3 is my story and I'm stickin' to it.
mike
doesn't take 2 minutes to convert each song,it takes 2 minutes to convert <big>A SET of songs.
If you can load/decode/recode from mp3 to wma at the rate
of 8 songs per second (1000 songs in 2 minutes), you've got a
computer with some serious horsepower.
Wish I could afford one like that.
Can I borrow it? Shouldn't need it for long.
mike
I can confirm that mp3's use up only 104 MHz on my Axim x51v A12 ROM with Coreplayer 1.04. This is using auto. I spent a lot of time testing the pocket player demo and while it's a darn good looking player, it just ravages the battery.
If you don't want to pay for Coreplayer right now you can just use TCPMP and get pretty much the same effect of 104 MHz.
I use an 1800 MAh battery, so I estimate that Coreplayer can last me 8-12 hours with mp3's playing and screen off. I've never actually checked the maximum.
In my own tests I found that TCPMP/Coreplayer is the absolute lowest out of Mort/GSPlayer/WMP 10 for batt usage.
I can confirm that mp3's use up only 104 MHz on my Axim x51v A12 ROM with Coreplayer 1.04. This is using auto. I spent a lot of time testing the pocket player demo and while it's a darn good looking player, it just ravages the battery.
If you don't want to pay for Coreplayer right now you can just use TCPMP and get pretty much the same effect of 104 MHz.
I use an 1800 MAh battery, so I estimate that Coreplayer can last me 8-12 hours with mp3's playing and screen off. I've never actually checked the maximum.
In my own tests I found that TCPMP/Coreplayer is the absolute lowest out of Mort/GSPlayer/WMP 10 for batt usage.
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