April 2026: Aria-3.5, episodic memory, multilingual TTS, and video generation at 1080p

Aria-3.5: episodic recall fine-tune

• Fine-tuned Aria-3 on a synthetic dataset of 1.2M episodic memory examples.
• Model now distinguishes between factual memory ("you like coffee") and event memory ("the conversation about your job change").
• Episodic recall accuracy improved 38% on a held-out benchmark vs. Aria-3 base.
• Context window unchanged at 32k tokens.

Ref: ARIA-350

Episodic memory: event-based retrieval

• Memory store now indexes events as time-stamped episodes in addition to discrete facts.
• Retrieval pipeline selects the most relevant episode from the index given the current conversation context.
• Requires Aria-3.5 to interpret; falls back gracefully to fact retrieval on older sessions.

Ref: MEM-210

TTS v3.1: 22-language multilingual checkpoint

• Extended the TTS prosody model to 22 languages in a single multilingual checkpoint.
• Added Arabic, Hindi, Thai, and Vietnamese.
• Cross-lingual MOS on new languages: 3.8 average, vs. 4.1 for English.
• TTFA unchanged at 0.9s p50 across all languages.

Video generation: 1080p on new inference hardware

• Deployed a new GPU inference tier; 1080p output now available at p95 generation time of 22s.
• Temporal consistency score at 1080p: 0.84 (slightly below 720p 0.86 due to resolution scaling artifacts being worked on).
• 720p remains default; 1080p opt-in in generation settings.

Image generation: face-match score v2

• Updated the face-similarity evaluation model to a newer backbone (ArcFace v3).
• Recalibrated face-match targets; effective score on the existing test set: 81%.
• No change to the generation model itself; improvement is in evaluation accuracy.

Audio DSP echo fix (VOX-412)

• Root cause: DSP buffer size misconfigured for chipsets with asymmetric capture/playback latency (Qualcomm WCD9385 and similar).
• Fix deployed April 3; validated on 40 Bluetooth headset models in the device lab.
• Echo reports dropped to baseline noise level post-deploy.

Ref: VOX-412

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