Add more sections.

README.md

@@ -10,7 +10,7 @@ The online [Faust IDE](https://faustide.grame.fr) can be used to _edit_, _compil
 The editor engine is based on [Monaco Editor](https://microsoft.github.io/monaco-editor/). It provides _syntax highlighting_, _auto completion_, _code hinting_ and direct access to the _online documentation_. The documentation command (Ctrl-D) uses the function name at the cursor position to locate the relevant information.
 
 #### Project Files
-Several DSP files can be added in the top-left *Project Files* section and edited independently. Any non standard library, like a *foo.lib* file, can simply be added by drag/drop, then used in the DP code with `import("foo.lib");`. 
+Several DSP files can be added in the top-left *Project Files* section and edited independently. Any non standard library, like a *foo.lib* file, can simply be added by drag/drop, then used in the DP code with `import("foo.lib");`. DSP files or libraies can also be loaded or saved with the *Upload* and *Save As* buttons in the left column. 
 
 #### Auto-Compiling
 While the option is turned on, the diagram or the DSP UI will automatically be updated from the code. The editor will also try to tell if there is an error in your code.
@@ -21,13 +21,19 @@ MIDI Input is available for Chrome and Firefox browsers. You can also use the co
 #### Audio Input
 You can choose your audio device or use an audio file to simulate the audio input of DSP. Drap and drop your file to the waveform below to substitute the file.
 
+#### Audio Output
+* Audio output can be switched on/off using the he *Output is On/Output is Off* button on the bottom-right. 
+
+#### Audio Recording
+The generated sound can be recorded on the fly then possibly saved using the *Record/Save* section on the bottom-right. 
+
 #### Polyphonic mode
 The polyphonic mode can be activated by selecting a number of voices in the _Poly Voices_ menu on the left. [Standard Polyphony Parameters](https://faustdoc.grame.fr/manual/midi/#standard-polyphony-parameters) have to be used in the DSP voice.
 
 A global effect can be added using the `effect = foo;` [convention](https://faustdoc.grame.fr/manual/midi/#audio-effects-and-polyphonic-synthesizer). 
 
 #### Remote compilation
-The currently edited DSP program can be sent to the [remote compilation service](https://github.com/grame-cncm/faustservice) which allows to export for a large number of targets, like various standalone formats, a Max/MSP external on macOS or Windows, a SuperCollider UGen.etc. Use the "Truck" button on the left to access the list of possible *Platform* and the list associated *Architecture*. Select one *Platform/Architecture* pair and wait a bit until you get the compiled result as a binary zipped file.  
+The currently edited DSP program can be sent to the [remote compilation service](https://github.com/grame-cncm/faustservice) which allows to export for a large number of targets, like various standalone formats, a Max/MSP external on macOS or Windows, a SuperCollider UGen.etc. Use the *Truck* button on the left column to access the list of possible *Platform* and the list of associated *Architecture*. Select one *Platform/Architecture* pair and wait a bit until you get the compiled result as a binary zipped file.  
 Note that some targets produce a source file (like *source/cplusplus*), or ready to be compiled projects (like *juce/plug-in* to create a [JUCE](https://juce.com) project).
 
 #### Audio analyzers
@@ -46,11 +52,9 @@ In the _Plot_ Tab in the middle section, you can switch the visualization betwee
 Both input and output have an audio analyzer in the right panel. In the small audio output window at the bottom, you can switch the visualization between _Oscilloscope_ and _Spectroscope_, or change buffer size and channel. Three numbers showing at right side are current value, estimated frequency and RMS.
 
 #### SVG Diagrams
-
 The _Diagram_ tab allows displaying the circuit SVG diagram. You can navigate inside it by clicking on the dark blue part to go down in the circuit hierarchy, or clicking on the diagram border to go up in the circuit hierarchy.
 
 ## Recommended Browsers
-
 The recommended browsers are the latest versions of Chrome and Firefox for AudioWorklet and MIDI, but it requires an https connection to use the audio inputs.
 
 ## Building