Bluetooth tempo and pitch issues?


Interesting artifact I'm hearing streaming my iPad over a Bluetooth connection. I'm hearing slowing and speeding pitch! Subtle, but it is almost like a turntable with a finger on it some moments. Anybody?
jmacinnis
There isn't a 'very slight loss in quality', there's a HUGE loss in quality.

But I do agree with you, it is very convenient. And I use it sometimes when cooking or doing some other activity, but never for serious listening.

Bluetooth involves WAY too many sonic compromises for serious listening.

M_snow: "There isn't a 'very slight loss in quality', there's a HUGE loss in quality."

While it would be foolish to deny your experience, I would be very interested to learn what equipment you are using that allows you to come to such a dramatic conclusion. I'm going to guess it is NOT, for example, the $10,000 Chord CPM 2800 digital integrated amplifier (with Bluetooth capability).

And yes, I realize that this is essentially an "argument from authority" (I've never heard this unit), but I find it very difficult to believe that a highly respected manufacturer of high end equipment would be foolish enough to offer a $10,000 amp that includes a feature that represents a "HUGE loss in quality."

What I CAN say (with complete conviction) is that my far more modest Chordette Gem (at less than one-tenth the price) offers a quite satisfactory musical experience--though one not quite as good as my twice as expensive Wavelength Brick. And I'm pretty sure that if you stopped by for a listen you would be unable to honestly maintain your rather extreme position.
-

Jmacinnis: It would be interesting to know what equipment you are using in your Bluetooth setup. Maybe these are the source of your problem.

While hardly an expert on this issue, I do know that Bluetooth comes in a bewildering array of "flavors," some of which are completely inimical to high-quality audio transmission. The A2DP profile that my Chordette Gem and various iDevices use seems to work quite nicely. Current iDevices are, in addition, Bluetooth 4.0 compliant--which means they use less power, and pair almost instantly with their receivers.

If you've got a couple of days to waste, you can read all about the various Bluetooth specifications here. I suggest taking a couple of aspirins before you start in order to ward off the blinding headache you're almost guaranteed to end up with after the first few paragraphs.
-
Rel - I didn't even know such an item existed, so I certainly haven't heard it.

Think about this: any codec used by Bluetooth has to be lossy in order to fit within the available bandwidth. Additionally, a CD player needs a bit-rate of at least 1.4 megabit-per-second for stereo, and A2DP allows for a maximum of 512 kilobits-per-second for stereo.

I'm not saying Bluetooth can't offer a 'quite satisfactory musical experience', but even you admit it's not as good as your Wavelength. I LOVE the convenience of Bluetooth music, but not for serious listening -- in MY opinion, & from MY experience.