kern/51784: "Synthesized" speaker hums

[paul%whooppee.com@localhost]

>Number:         51784
>Category:       kern
>Synopsis:       "synthesized" speaker hums
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Jan 06 03:10:00 +0000 2017
>Originator:     Paul Goyette
>Release:        NetBSD 7.99.53
>Organization:
+------------------+--------------------------+------------------------+
| Paul Goyette     | PGP Key fingerprint:     | E-mail addresses:      |
| (Retired)        | FA29 0E3B 35AF E8AE 6651 | paul at whooppee.com   |
| Kernel Developer | 0786 F758 55DE 53BA 7731 | pgoyette at netbsd.org |
+------------------+--------------------------+------------------------+
>Environment:
	
	
System: NetBSD speedy.whooppee.com 7.99.53 NetBSD 7.99.53 (SPEEDY 2016-12-31 23:00:24) #1: Sun Jan 1 01:39:34 UTC 2017 paul%speedy.whooppee.com@localhost:/build/netbsd-local/obj/amd64/sys/arch/amd64/compile/SPEEDY amd64
Architecture: x86_64
Machine: amd64
>Description:
	
When outputting a sustained tone to the synthesized speaker (attached at
audio?), there is a distinct "hum" or "buzz", typical of "60-cycle power
line hum" from the old days!
>How-To-Repeat:
echo T60L1CP1CP1C /dev/speaker
	
>Fix:
unknown
	

>Unformatted: