diff --git a/.idea/dictionaries/bt.xml b/.idea/dictionaries/bt.xml
index 708c9a0f39..b92131dc77 100644
--- a/.idea/dictionaries/bt.xml
+++ b/.idea/dictionaries/bt.xml
@@ -26,6 +26,7 @@
       <w>transcoded</w>
       <w>transcodings</w>
       <w>upserting</w>
+      <w>vocoded</w>
       <w>vocoder</w>
       <w>vocoders</w>
       <w>vocodes</w>
diff --git a/crates/lib/database_queries/src/queries/tts/tts_models/get_tts_model_for_inference.rs b/crates/lib/database_queries/src/queries/tts/tts_models/get_tts_model_for_inference.rs
index 490429f21c..4d94dc12fc 100644
--- a/crates/lib/database_queries/src/queries/tts/tts_models/get_tts_model_for_inference.rs
+++ b/crates/lib/database_queries/src/queries/tts/tts_models/get_tts_model_for_inference.rs
@@ -8,6 +8,7 @@ use enums::common::vocoder_type::VocoderType;
 use log::warn;
 use sqlx::MySqlPool;
 use sqlx;
+use crate::helpers::boolean_converters::i8_to_bool;
 
 // TODO: Can probably just reuse another query.
 
@@ -19,6 +20,10 @@ pub struct TtsModelForInferenceRecord {
   /// NB: text_pipeline_type may not always be present in the database.
   pub text_pipeline_type: Option<String>,
 
+  /// Whether to multiply the mel outputs before being vocoded.
+  pub use_default_mel_multiply_factor: bool,
+  pub maybe_custom_mel_multiply_factor: Option<f64>,
+
   /// [vocoders 1]
   /// This is the new type of vocoder configuration. Users can choose a custom trained
   /// vocoder to associate with their model. The tokens reference the `vocoder_models`
@@ -88,6 +93,9 @@ SELECT
     tts.tts_model_type,
     tts.text_pipeline_type,
 
+    tts.use_default_mel_multiply_factor,
+    tts.maybe_custom_mel_multiply_factor,
+
     tts.maybe_default_pretrained_vocoder,
 
     tts.maybe_custom_vocoder_token,
@@ -145,6 +153,8 @@ WHERE tts.token = ?
     model_token: model.model_token,
     tts_model_type: model.tts_model_type,
     text_pipeline_type: model.text_pipeline_type,
+    use_default_mel_multiply_factor: i8_to_bool(model.use_default_mel_multiply_factor),
+    maybe_custom_mel_multiply_factor: model.maybe_custom_mel_multiply_factor,
     maybe_custom_vocoder: match model.maybe_custom_vocoder_token {
       // NB: We're relying on a single field's presence to infer that the others vocoder fields
       // are also there. If for some reason they aren't, fail open.
@@ -178,6 +188,9 @@ struct InternalTtsModelForInferenceRecordRaw {
 
   text_pipeline_type: Option<String>,
 
+  use_default_mel_multiply_factor: i8, // NB: bool
+  maybe_custom_mel_multiply_factor: Option<f64>,
+
   // Joined custom vocoder fields
   maybe_custom_vocoder_token: Option<String>,
   maybe_custom_vocoder_type: Option<VocoderType>,
diff --git a/crates/service/job/tts_inference_job/src/http_clients/tts_inference_sidecar_client.rs b/crates/service/job/tts_inference_job/src/http_clients/tts_inference_sidecar_client.rs
index 0a3a017bc7..73ce8aa0f9 100644
--- a/crates/service/job/tts_inference_job/src/http_clients/tts_inference_sidecar_client.rs
+++ b/crates/service/job/tts_inference_job/src/http_clients/tts_inference_sidecar_client.rs
@@ -30,6 +30,10 @@ struct InferenceRequest {
   // Named text pipeline/algorithm, eg. "legacy_fakeyou", "english_v1", "spanish_v2", etc.
   pub text_pipeline_type: String,
 
+  // Whether to multiply the mel outputs before being vocoded.
+  use_default_mel_multiply_factor: bool,
+  maybe_custom_mel_multiply_factor: Option<f64>,
+
   // Output information
   pub output_audio_filename : String,
   pub output_spectrogram_filename : String,
@@ -67,6 +71,8 @@ impl TtsInferenceSidecarClient {
     output_spectrogram_filename: P,
     output_metadata_filename: P,
     maybe_unload_model_path: Option<String>,
+    use_default_mel_multiply_factor: bool,
+    maybe_custom_mel_multiply_factor: Option<f64>,
   ) -> AnyhowResult<()> {
 
     let waveglow_vocoder_checkpoint_path = waveglow_vocoder_checkpoint_path
@@ -116,6 +122,7 @@ impl TtsInferenceSidecarClient {
       max_decoder_steps,
       vocoder_type,
       text_pipeline_type: text_pipeline_type.to_string(),
+      use_default_mel_multiply_factor,
       waveglow_vocoder_checkpoint_path,
       hifigan_vocoder_checkpoint_path,
       hifigan_superres_vocoder_checkpoint_path,
@@ -124,6 +131,7 @@ impl TtsInferenceSidecarClient {
       output_spectrogram_filename,
       output_metadata_filename,
       maybe_clear_synthesizer_checkpoint_path: maybe_unload_model_path,
+      maybe_custom_mel_multiply_factor,
     };
 
     let url = format!("http://{}/infer", self.hostname);
diff --git a/crates/service/job/tts_inference_job/src/job_steps/process_single_job.rs b/crates/service/job/tts_inference_job/src/job_steps/process_single_job.rs
index 0f89ded89f..eede074aba 100644
--- a/crates/service/job/tts_inference_job/src/job_steps/process_single_job.rs
+++ b/crates/service/job/tts_inference_job/src/job_steps/process_single_job.rs
@@ -301,7 +301,10 @@ pub async fn process_single_job(
     &output_audio_fs_path,
     &output_spectrogram_fs_path,
     &output_metadata_fs_path,
-    maybe_unload_model_path)
+    maybe_unload_model_path,
+    model_record.use_default_mel_multiply_factor,
+    model_record.maybe_custom_mel_multiply_factor,
+  )
       .await
       .map_err(|e| ProcessSingleJobError::Other(e))?;