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Error and correction beeps



Does anyone know how exactly Xy interacts with a sound card to produce error and correction beeps? I really need these audible cues, since I have to look frequently at the keyboard (to get back on the home row, once I'm off it), not to mention sometimes typing from notes. On my laptop, until the sound card died, I used to hear them fine, but not a peep on the new system. When I command:
VA/NV CB [or EB]
I get the default values (52,4096 for CB and 1792,36865 for EB). Recalling from my first 486 that faster systems require higher values, at least for duration, I have set the second figures in both to their maxima (65534 for both) and played around with various possibilities, from low to high (one assumes the larger number denotes a higher pitch, and therefore one less audible to agèd ears). All this with DEFAULT commands from the Command Line. I note that my current SETTINGS.DFL (which has to be tweaked and customized) has no value for either, but surely if it is set from the CmdLine it should take effect?
        The sound card and speakers are working fine within Windoesn't. I don't usually bother with sound, rarely having need of it except for error and correction beeps, but sound is built-in to this MoBo, and hence the speaker appears to be automatically disabled. So to get the beeps I need the sound, but Xy doesn't appear to be talking to the sound card, though, as I said, it did to the one in my laptop and does the the system at the office I've been running it on temporarily.
Patricia