~ wrote:
I think how the slow and fast USB chirps would actually sound.
The...
what? WTF are you talking about? The USB standard is entirely electronic - it
has no audio component, or anything else other than electrical signals, for that matter (i.e., there is no requirement that a device have any kind of sound or light indicator to show the connection - some do, but those are specific to the device, as a convenience to the users, not part of the USB system itself).
What could possible have given you the idea it did?
AFAICT, the USB connection type (and things such as transfer mode, voltage, etc.) is determined in a handshake consisting of several header packets sent between the devices and the host at the time the device is plugged in. These data packets are sent as USB 1.0 in the 'low-speed' mode, for compatibility, but contain data describing which versions of the standard are supported by the device, with similar packets coming back describing the host's capabilities; the two the negotiate the speed, transfer mode, etc. based on that information.
I suppose some documents might call this handshaking a 'chirp', by analogy to the tone-based handshaking (the so-called 'whalesong') used in older analog phone line modems. If so, that's a really misleading name for it, as it is a) entirely electrical, and b) not a single datum, but a series of packets being sent back and forth.
In any case, the conversation going from the sounds made by hard drive heads moving to USB devices handshaking is... a
non sequitur at best. AFAIK, all external hard drives which can be connected via USB still use a drive controller connection such as SATA or SCSI, with a bridge connecting it the the external USB connection - the drive's internal controller has no way of knowing that there is a USB connection involved in the chain. And of course, solid-state drives don't
have moving parts larger than electrons at all... that's part of why they are called 'solid state'.