Re: kern/51784: "Synthesized" speaker hums

[Nathanial Sloss <nat%netbsd.org@localhost>]

The following reply was made to PR kern/51784; it has been noted by GNATS.

From: Nathanial Sloss <nat%netbsd.org@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: gnats-admin%netbsd.org@localhost,
 netbsd-bugs%netbsd.org@localhost,
 paul%whooppee.com@localhost
Subject: Re: kern/51784: "Synthesized" speaker hums
Date: Thu, 25 May 2017 18:55:17 +1000

 Hi,
 
 I've since found there is quality loss converting from ulaw to signed linear.
 
 I now have a 16 bit 1 channel signed linear bell.
 
 To use apply this patch:
 ftp.netbsd.org/pub/NetBSD/misc/nat/hiresbell-linear.diff
 and add the following to your kernel config:
 options HIRES_BELL
 
 Please let me know if this resolves the "hum" this time?
 
 Best regards,
 
 Nat