Quote:
Originally Posted by Doitsu
But if I connect a Bluetooh headset with a smartphone or tablet won't the devices need to perform an audio-to-digital conversion first with an analog-to-digital converter before they can transmit the BT packets?
And unless the Kindle TTS module is capable of generating BT-compatible audio data packets, the Kindle would at least need an ADC. |
There is no audio, even though digital data is used to REPRESENT audio inside the computer, and to a computer everything is just digital "numbers". The voice files are either digital already (in a file full of digital bits and bytes), or directly synthesized in software (also digital bits and bytes). Therefore, there is no analog audio to convert to digital -- no varying analog voltage "audio" until it drives the speaker element near your ear. All digital all the way to the amplifier at the output transducer (inside the bluetooth headset or speaker).
In essence, all a "sound card" really does is translate between digital and analog (with some analog amplification and filtering in the signal path), and without analog sound transducers (speakers or headphones) wired to a kindle, it has no need for such unused hardware as a "sound card". Even with a USB sound dongle, the "sound card" is in the dongle. And for sound output, the digital-to-analog converter can be as simple as an
R-2R resistor ladder network.
Now regarding sound cards, a whole 'nother can of worms is opened up when you consider that
sound is perceptual, and not "real" in the general sense. And that does not begin to consider the consequences of the theory that reality itself only exists while it is being consciously observed.