Documentation

Postlink is a platform designed for seamless remote audio post. Stream flawless audio and video direct from your session to clients on any device with sample accurate sync. Includes optional integrated video conferencing. Talent recording coming soon!

System Requirements

Quick Start

On external conferencing

In theory audio from the Postlink Stream can bleed into an external conference (Zoom, Teams, etc) if a client participant is not wearing headphones and has their mic unmted during playback. In practice this is rarely an issue since those apps apply aggressive noise cancellation settings by deafult. Postlink integrated conferencing handles this transparently, as it fully supports Automatic Echo Cancellation (AEC) which is designed for this purpose.

Dashboard / Room Management

Once you create an account you will be in the dashboard. You'll see your new room listed and a set of links: one for the Engineer and one for Clients. You can disable conferencing by toggling the switch. You can create as many additional rooms as you want, each will have their own links and each will be authorized separately. To authorize a room click Activate. You can manage subscriptions for each room by clicking Billing.

Room Links

Plugin

Supported Hosts:
  • Pro Tools on Mac >= 10.15 (Intel or Apple silicon).

Click Get The Plugin to download and install as you normally would. It's a universal binary that works on Intel and Apple silicon Macs. Then put it on an Aux track.

Send And Receive Audio

You can send and receive up to four channels of audio. To set the number of send channels you specify the Aux's Track Width. Do this when first creating the Aux, or update an existing one by right-clicking on the track name area.

Plugin Input Channels

To set the number of receive channels, instantiate the Postlink Plugin with the corresponding number of output channels (in the plugin menu you can choose from one to four outputs).

Plugin Output Channels
For Example: To send two channels and receive three, create a Stereo Aux and instantiate the plugin version that reads Stereo/LCR. You will now have an Aux that has two input channels and three output channels. In Pro Tools, channel meters always show the Track/Aux's output channels, so these will always show audio received from the network. Just open the plugin to see both send and receive:

Plugin Meters

Routing

For sending, create a bus that matches the Aux's input channel count and assign it as you normally would. For receiving, do the same for the Aux's output, then create subpaths in the size and configuration that you'd like. From the example above, create an LCR bus, and then three mono subpaths if you want to record on three separate mono tracks, or one stereo subpath and one mono subpath if you want to record on one stereo track and one mono track. And so on.

Subpaths Mono Subpaths Stereo Mono

Any audio sent to the plugin's input is sent to the network while any audio received from the network is delivered to the plugin's output. Illustrated here:

Plugin Signal Flow

Video

The plugin automatically adds any applicable video to the audio stream with sample accurate sync.
IMPORTANT: Any updates made to video tracks must be written to the session file in order to be reflected in the stream (⌘S or whatever else).
IMPORTANT: Due to a Pro Tools bug/limitation, your Aux should always be assigned to some bus or output, even if you don't plan on receiving any audio. Otherwise channels in your sending audio can be summed together in ways you don't expect. (The assigned bus or output itself need not be routed anywhere).