AudioConcatenate

The AudioConcatenate node technically receives two audio dictionaries containing waveform data and sample rates as inputs.

The AudioConcatenate node is an audio processing tool whose core function is to concatenate two audio segments into a longer audio clip. It allows users to specify the order of concatenation, providing flexibility in combining audio materials.

Node Functionality

This node technically receives two audio dictionaries containing waveform data and sample rates as inputs. It first checks if the sample rates of the two audio inputs are consistent; if not, an error will be reported. After confirming that the sample rates match, the node uses PyTorch's torch.cat function to concatenate the waveform data along the width dimension according to the user-selected direction, ultimately outputting a new audio dictionary containing the concatenated waveform and the original sample rate.

Node Parameter Description - AudioConcatenate

Connection Inputs

Parameter Name	Data Type	Required	Default Value	Value Range/Options	Description
`audio1`	AUDIO	Yes	-	-	: Input the first audio data to be concatenated.
`audio2`	AUDIO	Yes	-	-	: Input the second audio data to be concatenated.

Control Parameters

Parameter Name	Data Type	Required	Default Value	Value Range/Options	Description
`direction`	COMBO	Yes	right	"right", "left"	: Controls the concatenation order of the two audio segments. Options are "right" (audio1 first, audio2 second) or "left" (audio2 first, audio1 second).

Output

Parameter Name	Data Type	Description
AUDIO	AUDIO	: Outputs the newly concatenated audio data.

Usage Scenarios

In workflows for creating audiobooks or podcasts, you can use this node to sequentially concatenate multiple recorded chapters or segments. For example, by using the opening music as audio1 and the narration content as audio2, and selecting the "right" direction, you can generate a complete audio segment with opening music.

Notes

Please note that this node requires the two input audio segments to have the same sample rate; otherwise, processing cannot proceed. The concatenation operation is performed only along the time dimension and does not involve any mixing or overlapping of the audio content.