Rendering a Song as an Audio File
To create an audio file from your song you have to render it. Rendering is only enabled in the registered version of Renoise. As well as exporting the whole song as a .wav, you can also save and reuse parts of a song. By rendering each track into a separate file you can even post-process your tracks in other multi-track audio editors.
Renoise cannot directly render .mp3 files, only uncompressed .wav files. Those .wav files can then be easily converted to .mp3 files with free external applications.
Opening the Render Dialog
You can open the Render dialog by either hitting the "Render" button in the Disk Browser with the "Song" category selected, or by using the main menu option: "File -> Render Song To Disk...". To quickly render, resample and reuse parts of the song in the Pattern Editor, see Render & Resample Parts of the Song.
Part to Render
This specifies which part of the song you want to render. Note that muted tracks and columns are never rendered by Renoise, making it easy to exclude tracks you don't want to export.
- Entire Song: Renders the entire song.
- Selection in Sequence: Render only a selected pattern range from the Pattern Sequencer. You can also select this range in the Pattern Sequencer directly by using the Pattern Sequencer's context menu: "Render Sequence Selection To Sample...".
- Selection in Pattern: Renders only the area selected in the current pattern (see Render & Resample Parts of the Song). This can also be quickly done using the Pattern Editor's context menu: "Render Selection To Sample...".
This determines where the .wav file should be saved and under which name. Hitting the "Browse" button will prompt you to select the folder where you would like the rendered files to be saved. Enter the name of the file in the text field next to the "Browse" button. The destination file(s) will always be standard .wav audio files.
Enabling the option, "Use automatic file naming" will name the saved render(s) automatically. Clicking the right-hand arrow will open a menu that shows the various commands which can be inserted into the naming scheme. Clicking on an option will place that text at the end of the existing command.
Rendering Offline is faster, more accurate and allows more options. Rendering in real-time will simply play the song and record the output. This allows the recording of Line-In Devices and MIDI instruments. Some plug-in instruments and effects may render incorrectly when run faster than real-time, so use this mode for those occasions.
- Interpolation: Select the resampling quality that should be used in the rendering process. "Cubic" is what you've heard when playing back and composing the song. "Arguru's Sinc" is a very precise interpolation mode that cannot be used in real-time and so only is available when rendering. This mode results into the best possible sample playback quality, but may also lead into some unwanted effects. Please see Sinc Interpolation for more details.
- Sample Rate: Select a sample-rate for the rendering process. By default, the currently active sample-rate is selected and it is recommended to use this. Many DSPs may sound slightly different at other rates, so changing the rate may result in a slightly different sound from what you expect. Some external VST or AU plugins don't even support sample-rate changes. If you change the rate to something other than the default, then listen back to the rendered result to ensure that everything is correct. Alternatively, play back your song in Renoise using the different rate first and fine-tune the song when needed. This can be done by changing the sample-rate in the "Edit -> Preferences -> Audio" tab.
- Bit Depth - Select the bit-depth of the resulting .wav file. Renoise internally renders in 32-bit float, the highest quality, so you should use this format when you plan to reuse the rendered song in other applications. CDs use 16-bit with a sample-rate of 44,100 kHz, so you can choose to render in this format for burning songs directly to CD (bear in mind the potential issues with changing your default sample-rate as noted above, though).
- Save each track into a separate file: When enabled, the song will not be rendered into a single file, but instead will create one file per track. This can be useful if you want to export loops (when used in conjunction with "Selection in Sequence/Pattern") or to post-process the tracks in an external multi-track audio editor. Note that completely silent tracks will be deleted at the end of the rendering process.
- Save each pattern into a separate file: When enabled, this creates new files for every single position in the Pattern Sequencer (not just each numbered pattern once). This is extremely useful to quickly cut and export your song as a set of loops. Note that completely silent patterns will be deleted at the end of the rendering process.
- Priority: To render a batch of songs as quickly as possible, the rendering process bypasses your soundcard. Unfortunately, some plugin instruments and effects render incorrectly when they run faster than real-time. As a workaround for those plugins, Renoise also offers a pseudo-real-time priority rendering mode. If you use plugin synths (VSTi/AUs) or effects and the resulting files do not sound as they should, try rendering again using the "Real" mode.
Hidden rendering feature
- Sequence marker positions: When rendering your song output to a Wave file: All the sequence positions are written along the wave file allowing you to more easily cutting up your work in external editors or when you are a developer even develop own internal play-routines that allows you playing the rendered output from any precise sequencer position. (Integration of multi-song concepts into one wave-file)
As already mentioned in the Render Options, Renoise offers an alternative way to resample during rendering: the "Sinc" interpolation mode. Interpolation occurs when playing back a sample at a note other than its original frequency. "Linear" and "Cubic" interpolations do this roughly and quickly but with excellent results.
"Sinc" mode interpolates as precisely as possible, preserving the original character and shape of samples when played at different pitches. The drawbacks are that this processing is very slow and things may no longer sound exactly as they did during normal playback. If, for example, you drastically pitch up a hi-hat or another sample with a lot of high frequencies, then the "Sinc" mode will often sound a lot smoother. Although this smoother sound is technically more "perfect", it may not be what you want to hear. Here is an extreme example:
If this is the case, then you can explicitly disable the "Sinc" interpolation for some samples. For more information regarding this, see "Interpolate" in the Sample Properties section of the manual.