vaimr · April 6, 2021 12:42 · Oct 17, 2020 · Dec 28, 2019 · Dec 28, 2019 · Dec 28, 2019
diff --git a/recording_application_and_microphone.md b/recording_application_and_microphone.md
@@ -27,6 +27,8 @@ pacmd load-module module-combine-sink sink_name=combined sink_properties=device.
 ```
 
 ## Step 3. Attach microphone to `recording` sink
+_Protip: If you ommit this step you may record multiple apps without microphone._
+
 First we have to locate our microphone as a source:
 ```sh
 pacmd list-sources | egrep '^\s+name: .*' | grep input
@@ -40,7 +42,6 @@ Now we attach it to `redording` sink:
 ```sh
 pacmd load-module module-loopback source=alsa_input.pci-0000_00_1f.3.analog-stereo sink=recording latency_msec=1
 ```
-_Protip: If you ommit this step you may record multiple apps without microphone._
 
 ## Step 4. Channel applications through the `combined` sink to record them (this step can be done after step 5. -- you can change what apps you record without stopping recording)
 Open `pavucontrol`, go to `Playback` tab and change sink to `combined`. _Hint: the application won't appear there unless it is producing sound._

diff --git a/recording_application_and_microphone.md b/recording_application_and_microphone.md
@@ -44,6 +44,7 @@ _Protip: If you ommit this step you may record multiple apps without microphone.
 
 ## Step 4. Channel applications through the `combined` sink to record them (this step can be done after step 5. -- you can change what apps you record without stopping recording)
 Open `pavucontrol`, go to `Playback` tab and change sink to `combined`. _Hint: the application won't appear there unless it is producing sound._
+
 ![image](https://user-images.githubusercontent.com/4380808/71537536-6132e980-2915-11ea-85ec-afd37f3ac183.png)
 
 ## Step 5. Record audio

diff --git a/recording_application_and_microphone.md b/recording_application_and_microphone.md
@@ -44,7 +44,7 @@ _Protip: If you ommit this step you may record multiple apps without microphone.
 
 ## Step 4. Channel applications through the `combined` sink to record them (this step can be done after step 5. -- you can change what apps you record without stopping recording)
 Open `pavucontrol`, go to `Playback` tab and change sink to `combined`. _Hint: the application won't appear there unless it is producing sound._
-TODO: add screenshots
+![image](https://user-images.githubusercontent.com/4380808/71537536-6132e980-2915-11ea-85ec-afd37f3ac183.png)
 
 ## Step 5. Record audio
 With the above setup, you can start and stop recording at any time. To record `recording` sink, use:

diff --git a/recording_application_and_microphone.md b/recording_application_and_microphone.md
@@ -0,0 +1,55 @@
+# How to record multiple applications and microphone into one audio file on Linux
+
+## Step 0. Terminology
+Sinks are for output, sources are for input. To stream source to sink a loopback must be created.
+More shall you find [there](https://gavv.github.io/articles/pulseaudio-under-the-hood/#key-abstractions).
+
+## Step 1. Create output sink that will be recorded
+Our output sink will be named `recording`.
+```sh
+pacmd load-module module-null-sink sink_name=recording sink_properties=device.description=recording
+```
+
+## Step 2. Create output sink that will forward data to `recording` and the default sink -- your headphones (using speakers is not a good idea because they will be recorded by microphone for the second time)
+First we have to locate our output sink:
+```sh
+pacmd list-sinks | egrep '^\s+name: .*'
+```
+For me it prints:
+```
+	name: <alsa_output.pci-0000_00_1f.3.analog-stereo>
+	name: <bluez_sink.4C_87_5D_07_5B_C4.a2dp_sink>
+```
+So I choose `bluez_sink.4C_87_5D_07_5B_C4.a2dp_sink` as my output sink because its my headphones (the other represents my speakers).
+Now we can combine it with our new `recording` sink into `combined` sink:
+```sh
+pacmd load-module module-combine-sink sink_name=combined sink_properties=device.description=combined slaves=recording,bluez_sink.4C_87_5D_07_5B_C4.a2dp_sink
+```
+
+## Step 3. Attach microphone to `recording` sink
+First we have to locate our microphone as a source:
+```sh
+pacmd list-sources | egrep '^\s+name: .*' | grep input
+```
+For me it produced:
+```
+	name: <alsa_input.pci-0000_00_1f.3.analog-stereo>
+```
+So `alsa_input.pci-0000_00_1f.3.analog-stereo` represents my microphone.
+Now we attach it to `redording` sink:
+```sh
+pacmd load-module module-loopback source=alsa_input.pci-0000_00_1f.3.analog-stereo sink=recording latency_msec=1
+```
+_Protip: If you ommit this step you may record multiple apps without microphone._
+
+## Step 4. Channel applications through the `combined` sink to record them (this step can be done after step 5. -- you can change what apps you record without stopping recording)
+Open `pavucontrol`, go to `Playback` tab and change sink to `combined`. _Hint: the application won't appear there unless it is producing sound._
+TODO: add screenshots
+
+## Step 5. Record audio
+With the above setup, you can start and stop recording at any time. To record `recording` sink, use:
+```sh
+parecord --channels=2 -d recording.monitor output.wav
+```
+It will save recording to `output.wav` file. To stop recording press `Crtl-C` (kill the parecord with SIGINT).
+_Protip: You can change recorded applications while recording by controlling which ones output to `combined` sink as was shown in step 4._
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