V-Blaze and V-Cloud Online Help


Substitution rules contain lists of “target:replacement” mappings, which enable you to correct consistent and frequent transcription errors that result from out-of-vocabulary words, excess noise in the audio, poor enunciation, or strong accents. They can also be used to correct word combinations that rarely occur in general speech but occur frequently within a specific domain or company.

For example, useful substitutions in the insurance domain could include “giant whale : giant hail” and “hit a beer : hit a deer”.

Table 1. Substitutions Parameters






V‑Cloud, V‑Blaze v5.6+, V‑Spark


Specifies a newline-delimited string that contains substitution rules to be applied during transcription. Rules can be specified directly as a string, however, the recommended approach is to auto-populate the string with the contents of a local substitution file into the subst_rules field by using the redirection operator <. This approach makes it easier to edit and maintain these rules over time.

Use the subst_rules parameter as shown in the example below.