mastering

FreqTweak

FreqTweak

FreqTweak is a tool for FFT-based realtime audio spectral manipulation and display. It provides several algorithms for processing audio data in the frequency domain and a highly interactive GUI to manipulate the associated filters for each. It also provides high-resolution spectral displays in the form of scrolling-raster spectrograms and energy vs frequency plots displaying both pre- and post-processed spectra.

JAMin

JAMin

JAMin is a mastering suite for Linux. It is a standalone program but can, via JACK, can be inserted into any programs signal path.

Some of JAMin's features include:
30 band graphic EQ
1023 band hand drawn EQ with parametric controls
Spectrum analyser
Multiband compression
Lookahead brickwall limiter
 

Ardour

Ardour

Ardour is a fully featured audio and MIDI multi-track recording and editing program. Ardour supports LADSPA, LV2 and LinuxVST plugin formats.

Features include powerful anything to anywhere signal routing, video timeline, direct import of freesound files, dedicated monitor section, meterbridge, inline plugin control and extensive export options, including exporting multiple formats at once.

Basic mixing in Ardour 3

In this video series, LMP invites you to mix an entire track together with us. The stems for the track used in this tutorial can be downloaded below. We'll start with importing the stems into Ardour and editing the song material. Next we will arrange the song before doing a basic balanced mix. Finally, we'll throw on some basic mastering effects, and do a few final touches.

Download the stems used in this tutorial series from this link.

High-pass filter

A high-pass filter (HPF) is a EQ filter that let's all high frequencies pass through unaffected, but cuts the low frequencies. For this reason, it is also sometimes referred to as a low cut filter.

On hardware mixers, a high pass filter set to a particular frequency is common. This most often is set at 75 Hz. Some hardware units and most software EQ's, however, will allow you to choose what frequency you want the filter to start at. Some will also allow you to configure the amount the frequency drops off below that point.

Insert

Inserts are found in both software and hardware mixers and allow external software and/or hardware to be inserted into the signal path. It does this through send and returns, where sends divert the channels signal to the device/software processor and the return takes the devices outgoing signal and routes it back into the signal path. In this way, you are effectively using an external device as a plugin.

Phase

Phase is the offset of two waveforms expressed in degrees, where 360 degrees corresponds to a delay of one cycle. Waveforms that are 180 degrees out of phase will cancel each other out to complete silence.

Phase problems can occur when two similar sound sources are out of alignment with each other. This causes the drop out of certain frequencies, which can make recordings sound thin if not dealt with.

Post-fader

Post-fader means that something is active after the fader. This is most commonly used when talking about effects, plugins, sends and inserts. As the fader controls the volume of the channel or track, putting something before or after the fader can have drastic effects on the volume of said thing. A common use for putting something post-fader is when you apply effects to a track or channel.

Pre-fader

Pre-fader means that something is active before the fader. This is most commonly used when talking about effects, plugins, sends and inserts. As the fader controls the volume of the channel or track, putting something before or after the fader can have drastic effects on the volume of said thing.

Most often, you put something pre-fader when you don't want it to be affected by changes in the track volume.

Modular

Modular set ups are where more than one program is used in a set up. JACK allows you to connect and sync various audio programs together so you can benefit from the strengths of individual applications. Session management can be used to manage and recall such complex set ups. A good suite of modular applications is the Non suite, which includes Non timeline, Non mixer and Non sequencer, although any JACK application can be incorporated into a modular set up.

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