Update articles/cognitive-services/Speech-Service/rest-text-to-speech.md

Author: jboback

articles/cognitive-services/Speech-Service/rest-text-to-speech.md

@@ -272,7 +272,7 @@ If the HTTP status is `200 OK`, the body of the response contains an audio file
 
 ## Audio outputs
 
-This is a list of supported audio formats that are sent in each request as the `X-Microsoft-OutputFormat` header. Each format incorporates a bit rate and encoding type. The Speech service supports 24-kHz, 16-kHz, and 8-kHz audio outputs. Prebuilt neural voices are created from samples that use a 24-khz sample rate. All voices can upsample or downsample to other sample rates when synthesizing.
+This is a list of supported audio formats that are sent in each request as the `X-Microsoft-OutputFormat` header. Each format incorporates a bit rate and encoding type. The Speech service supports 48-kHz, 24-kHz, 16-kHz, and 8-kHz audio outputs. Prebuilt neural voices are created from samples that use a 24-khz sample rate. All voices can upsample or downsample to other sample rates when synthesizing.
 
 |Streaming                         |Non-Streaming            |
 |----------------------------------|-------------------------|