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POST
Aura 2 (English)

Authorizations

Authorization
string
header
required

API key issued by SLNG. Pass as Authorization: Bearer <token>.

Body

application/json
text
string
required

Text to synthesize.

Minimum string length: 1
model
enum<string>
required

English voice model. Check the full list with audio samples in the voice list.

Available options:
aura-2-amalthea-en,
aura-2-andromeda-en,
aura-2-apollo-en,
aura-2-arcas-en,
aura-2-aries-en,
aura-2-asteria-en,
aura-2-athena-en,
aura-2-atlas-en,
aura-2-aurora-en,
aura-2-callista-en,
aura-2-cordelia-en,
aura-2-cora-en,
aura-2-delia-en,
aura-2-draco-en,
aura-2-electra-en,
aura-2-harmonia-en,
aura-2-helena-en,
aura-2-hera-en,
aura-2-hermes-en,
aura-2-hyperion-en,
aura-2-iris-en,
aura-2-janus-en,
aura-2-juno-en,
aura-2-jupiter-en,
aura-2-luna-en,
aura-2-mars-en,
aura-2-minerva-en,
aura-2-neptune-en,
aura-2-odysseus-en,
aura-2-ophelia-en,
aura-2-orion-en,
aura-2-orpheus-en,
aura-2-pandora-en,
aura-2-phoebe-en,
aura-2-pluto-en,
aura-2-saturn-en,
aura-2-selene-en,
aura-2-thalia-en,
aura-2-theia-en,
aura-2-vesta-en,
aura-2-zeus-en
encoding
enum<string>
default:linear16

Output audio encoding for HTTP synthesis (default linear16). Parameter applicability depends on the encoding and Deepgram rejects a parameter that does not apply: sample_rate does not apply to mp3 or opus, container does not apply to mp3 or flac, and bit_rate applies only to mp3 and opus. flac accepts every sample rate except 24000. aac is not offered because its raw stream cannot be metered. Over WebSocket the same Aura models accept only linear16, mulaw, and alaw.

Available options:
linear16,
mp3,
opus,
flac,
mulaw,
alaw
sample_rate
enum<integer>
default:24000

Output sample rate in Hz. Applies to linear16 (all values, default 24000), mulaw/alaw (8000 or 16000), and flac (8000, 16000, 32000, 48000; 24000 is rejected, default 48000). Must be omitted for mp3 and opus.

Available options:
8000,
16000,
24000,
32000,
48000
container
enum<string>
default:wav

Output container. none or wav for linear16, mulaw, and alaw (default wav); ogg only for opus. Must be omitted for mp3 and flac.

Available options:
none,
wav,
ogg
bit_rate
enum<integer>

Output bit rate for lossy encodings only. mp3 accepts 8000, 16000, 24000, 32000, and 48000 (the MP3 sample rate is derived from it, e.g. 48000 bps yields 24000 Hz); opus accepts every listed value. Must be omitted for other encodings.

Available options:
8000,
16000,
24000,
32000,
48000,
64000,
96000,
128000,
192000,
256000

Response

Synthesis successful.

Binary audio data.