add notes

raspberry.md

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+## connect via SSH
+
+
+# 
+ - see connected usb devices
+   - lsusb
+ - arecord -l
+
+ - test audio
+  - arecord --format=S16_LE --duration=5 --rate=16000 --file-type=raw out.raw
+  - arecord --format=S16_LE --duration=5 --rate=16000 -c1 test.wav
+
+
+.asoundrc
+
+  pcm.!default {
+  type asym
+  capture.pcm "mic"
+  playback.pcm "speaker"
+}
+pcm.mic {
+  type plug
+  slave {
+    pcm "hw:1,0"
+  }
+}