thoughts on using headphones to change log

git-svn-id: https://svn.code.sf.net/p/freetel/code@1988 01035d8c-6547-0410-b346-abe4f91aad63

diff --git a/smartmic/SM1000-D/change-log-D.txt b/smartmic/SM1000-D/change-log-D.txt
index 7564ff016890046fe59b86175801ab1c17c8a4b0..3a4f9c254befe6a928b6818d09233d6b9afa0134 100644 (file)
--- a/smartmic/SM1000-D/change-log-D.txt
+++ b/smartmic/SM1000-D/change-log-D.txt
@@ -24,4 +24,14 @@
 
 11. Microphone pins are swapped, ie rotate by 180 degrees.
 
+12. Should R46 be log?
+
+13. With bud type headphones, a low volume leve is reqd.  At these
+    levels some low freq noises at the frame rate and HF hiss can be
+    heard.  As these noises are still heard with zero volume its
+    probably noise from U8.  Might need soem HP/LP filtering.  Thru
+    loudspeaker fine.  Amount of noise varies with headphones used. As
+    volume is hard to regulate perhaps another option si a series
+    resistor with the headphone jack.
+