Flash Speech Synthesis Parameters in Full: A Synthesis Demo of a Multilingual Announcement

This piece uses the real synthesis pipeline of qwen-audio-3.0-tts-flash to demonstrate how "text + voice + natural language instructions" jointly determine the output of a speech clip. In the author's schema, text and voice are required fields, while rate/pitch/volume/format/sample_rate and others provide directly adjustable knobs; instruction is used to specify tone and delivery in descriptive language, and language_hints currently only processes the first array element. This piece feeds a cross-lingual product announcement script to the longanhuan_v3.6 voice for synthesis, with the instruction limited to "clear, steady announcer tone, moderate speaking rate," and outputs mp3. The voice itself does not come from a reference audio—the first version of Flash does not offer voice cloning and does not support text-only voice design, so what is demonstrated here is the path of a built-in voice plus instruction control. It is useful for observing: the perceptual differences of the same script under different rate/pitch settings, the effect of instructions on tone, and what the starting input looks like for scenarios such as real-time announcements, customer service voice output, and multilingual dubbing. Flash is positioned toward fast feedback and cost-sensitive high-concurrency calls; for formal content scenarios, it can be compared with the Plus version before choosing a model.