On 17/01/2011 03:03 PM, scott wrote:
>> I still rather suspect that rather than put in a high-quality DAC and a
>> low-quality DAC, they'll just not bother with the high-quality one at
>> all.
>
> And then your MP3s sound like phone conversations .... ummm I doubt it.
> IIRC phone conversations are up to 3.4 kHz or something, whilst MP3s are
> usually up to 20 kHz or so. As a very simple solution you could just run
> the same DAC at a slower clock rate for the voice calls to save power,
> but I bet there are far more sophisticated solutions actually used in
> the handsets.

Is power consumption directly related to clock speed in some way?

>>> The transmitter should be on almost zero power whilst playing music
>>
>> I don't know that much about GSM, but doesn't it have to periodically
>> broadcast to keep in touch with the network?
>
> Hence "almost" zero, and not actually zero.

Oh, OK.

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