Merge pull request #649 from daschuer/audacity-link

Link fix

source/chapters/microphones.rst

@@ -187,7 +187,7 @@ measure the round trip latency. These programs are recommended on each
 * **GNU/Linux**:
   `jack_iodelay <https://linuxmusicians.com/viewtopic.php?t=8022>`_
 * **Windows**: `RTL Utility  <https://oblique-audio.com/rtl-utility.php>`_
-* **macOS**: `Audacity <https://manual.audacityteam.org/man/latency_test.html>`_
+* **macOS**: `Audacity <https://support.audacityteam.org/troubleshooting/solving-recording-problems/latency-compensation>`_
 
 .. TODO: Uncomment when this diagram is added.
   .. figure:: ../_static/latency-measurement.png

source/hardware/controllers/pioneer_ddj_400.rst

@@ -18,7 +18,7 @@ Pioneer DDJ-400
 The Pioneer DDJ-400 is a 2 deck USB controller with an integrated audio interface
 designed for rekordbox.
 
-- `Manufacturer's Product Page <https://www.pioneerdj.com/product/controller/ddj-400/black/overview>`__
+- `Manufacturer's Product Page <https://www.pioneerdj.com/en/product/controller/archive/ddj-400/gold/overview/>`__
 - `Midi Mappings <https://www.pioneerdj.com/-/media/pioneerdj/software-info/controller/ddj-400/ddj-400_midi_message_list_e1.pdf>`__
 - `Hardware Diagram <https://www.pioneerdj.com/-/media/pioneerdj/software-info/controller/ddj-400/ddj-400_hardwarediagram_rekordboxdj_e1.pdf>`__
 - `Mapping Forum Thread <https://mixxx.discourse.group/t/pioneer-ddj-400/17476>`__