We can now use Bluetooth Headset to stream stereo music wirelessly from our Dell Axim Pocket PC with appropriate High Quality Audio BT Patches. But the WMP10 still still occasionally skips. Is there anyway you guys found that can eliminate such skipping? It will be ideal if this can be done.
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Hm... I just tried it on Firefox and it works fine as well. Either it was fixed or my PC is just special. ;)
Here's what it says:
Quote:
Using Bluetooth Headphones
Calibrating the Headphones
From the Tools menu (queue menu, atop the main list) select "BT headphone setup". Press the scan button you want to calibrate, and then press its corresponding button on your headphones. Do this for all three buttons. When you're done, press the [X] at the top right of the setup window. See the pics at the bottom of this page. If you haven't yet, you must first pair your device with the headphones. See the install booklet that came with your phones for how. The buttons will not be recognized if you have WMP running. If it is running do a soft reset, then avoid starting it ever again.
Getting the Most Quality Out of the Headphones
From the Options panel:
1. LGX: Turn off "Load cover art always"
2. HIP: You may get better results using the "WaveMapper2" device
3. GAPLESS: Turn on Gapless play, and (-optionally-) also check BTHQA
4. (See the rest of this for more suggestions)
And, from elsewhere:
1. Since BTHQA is enabled, there's no point keeping the VUs going, so don't display them for longer than necessary (e.g., only to check levels).
2. If you still have noise (ticks or pops), see if turning off the F/X and/or limit active EQ helps (i.e., if you have all five bands active (green or red knobs), see if you can get by with fewer. If you have reverb active, see if you can make do without, hard as that can be.
3. If you have Wi-Fi on, turn it off. BT and Wi-Fi operate over the same spectrum and can, and usually do, interfere with one another.
4. If still noise, see if going to the background does it. Tap the down-arrow at the top left of iPlay, then Start, then Today. Be sure that you have not set iPlay to pause when in the background (Options, HB menu). You can control iPlay either from the taskbar menu, or from the headphones. Avoid using Today plugins; they leach CPU. If you checked BTHQA, try new plays without it. Check for sources of interference: 2.4 GHz phones, typical microwave ovens, MLB spy satellites, etc. Try it out in the middle of nowhere. Or just get a real good pair of headphones and be glad that you did (the recommended solution).
There may be a noticeable complaint starting the first play of a set, such as a scratch (as it sounds when you cue a vinyl LP), but once started, the other files will play on smoothly, and usually as gapless as always (but not always, always). By setting GAPLESS to BTHQA, you can get around the cue sound at start of the very first play.
The term "high quality" with respect to the Bluetooth high-quality audio plugin is like calling a Geo a sports car. There is nothing high quality about the result. What you get is a medium-quality headset (which is not saying anything good, but it's not bad, either), but one without a tether. See the TECH TALK on headphones in the FAQ for more, where these phones are compared to the others [as time permits/TBD]. Take the warble test yourself... "Best results" I've found are gotten when playing FLAC files. This makes sense since these are not lossy to start, and so the encoding done by the BTHQA plugin starts with a clean source, unlike say mp3, which was already cut up and processed by a lossy encoder, to be encoded yet again, in even less quality. Still, even that is far from Hi-Fi. Not to be forgotten, the headphones actually do the decoding of the lossy-encoded stream sent from the BTHQA plugin. It goes something like this:
0. mp3 file
1. decoded by iplay to PCM data
2. received by [WAV driver/BTHQA plugin]
3. lossy encoded by the BTHQA plugin
4. transmitted by the BTHQA plugin using Bluetooth
5. received by the BT headphones
6. decoded by the BT headphones to PCM
7. converted from digital (PCM) to analog by a DAC
8. amplified by the headphone audio amp
9. played by the headphone spkrs
What BTHQA does is re-encode, like an mp3 encoder does, the PCM audio that players send to the wave device, much like you already do when you encode mp3 files yourself from a CD rip. The difference is this has to be done in much-faster- than-real-time, and on a very power-constrained CPU, so quality suffers, noticeably. On a scale of 1 to 10, with 1 being AM radio and 10 being a live concert, I'd give these Bluetooth headphones from HP a 3, when it's at its best. At its worst, it's like listening to a vinyl LP that's been played a few hundred times, with all its ticks, pops, and dull, flat sound. And the dull, flat sound is always there, even at its best. By "dull, flat sound", I mean sort of like a car that's been stripped, then refitted with junk parts and sold at auction -- you can tell it's a car, but some things about it just aren't right. That may be good enough for most, especially given its "mobile" environment.
Even when BT2 comes around, there's still the problem that the data coming out of #2 above needs to be encoded again (step #4 above), and that takes up CPU power. It's possible, however, that with enough available bandwidth (e.g., more than 3 Mbps realized throughput), the encoding process can be bypassed and the straight PCM data from step #2 can be transmitted to the phones. It hasn't happened yet. The BTHQA plugin transmits about 30k bytes (about 240kbps) every second. True CD audio moves 176k bytes (about 1411kbps) every second.
In general, the headphones are tick- and pop-free on the Axim X50v for all formats, even with reverb and active EQ. The range is good, even through a couple of walls. The quality is not even close to Hi-Fi though, since this has to use a bandwidth limited to only a few hundred kbps, and for Hi-Fi it needs at least 1.5 Mbps (accounting for overhead, then perhaps 3 Mbps). You can get a gist of the quality by thinking of the quality you get out of an 80kbps MP3 file -- not that great (dull and flat, but not necessarily with as many artifacts as a typical 80 kbps mp3). If you can't get a tick-free and pop-free play on your device, using whatever software, these phones are practically worthless. And if you can, it's still a dull sound.
For the X50v, when run at 520 MHz, there are still no ticks or pops. At 208 MHz, there are noticeable ticks. Not always, but noticeable and not acceptable. When using iPlay's built-in CPU clock adjuster to get 312 and 416 MHz speed: at 312 and at 416 the ticks are still there. So, stick to the 520 or 624 MHz speeds. You may find, however, that at times even 208 MHz is fine, just not always. Other devices may vary, and reducing CPU load, for example by disabling reverb, MAY get better results, but I don't notice that on the X50v: it needs 520 or 624 with iPlay to be continuously tick- and pop-free -- period. At five active EQ bands (plus reverb, plus xfeed) it still is tick-free and pop-free.
You may find that you will get better results turning off reverb. The iPAQ 4155, for example, a 400 MHz PXA255, plays glitch-free with reverb off. Turning off the software EQ may get you to an even lower CPU speed.
Using BTHQA (under GAPLESS, in the Options panel) may or may not improve the tick-freeness of the BT phones. It will reduce CPU load by about 20% however (e.g., instead of 4-5% to play a 44100Hz/stereo/128 kbps mp3, only 3-4% of available CPU power is used, all effects off).
If it starts acting up (ticks from interference), you may find that pressing the pause/play on the headphones gets things back in the swing.
As of .533, new entries were added to the GAPLESS menu. You may find that setting "Enable top performance" (or alternatively, high performance) makes for fewer, if any, audio problems when playing over the BT headphones. If you notice no difference between the three settings, use the "normal performance" setting.
A report from the front lines (Chicago) said good results were gotten only when turbo mode was turned off. While this gives less-than-great results here, you may want to try it there. Turning off turbo mode on the PXA270 (the current XScale line) drops the CPU speed to 208 MHz. If your device doesn't come with a way to adjust the CPU speed, you can use iPlay to do that (for Xscale CPUs). See the Options panel, under CPU, for more. The iPlay FAQ also has some stuff on the CPU speed control feature (re: overclocking).
Sorry for going off-topic, but can someone who can access the site please send me the trial of iPlay that's supposed to be there?
I've been wanting to try this app for ages but the bloody site never works for me!
Please? :)
My email's at daleyo@gmail.com - if you can drop the program there that'd be great. :)
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I did about a monh ago - no reply. :( That's why I'm asking!
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OK I have now had it running on my x50v for about 15 songs, and seems to have that 'skip' or micro gap once every 3 or 4 songs, so it's pretty darn good compared to all other media players I've tried.
wmp10,pocketmusic,tcpmp,ipaqamp,todayplayer,ppod,m ortplayer, and a couple of others I've tried and this is the only app that doesn't skip ( well not much).
x50v & i-tech clip s35.
Seriously, I still can't get on the website! Same message all the time. Can someone please send me the trial as I'm still wanting to try it. :approve:
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