Originally published on Whispp
The project brought Whispp’s audio-to-audio Voice Reconstruction AI together with the on-device processing capabilities of Snapdragon X Elite. Thirty participants across nine countries used the technology during everyday calls and online conversations, providing practical feedback on performance, usability, privacy and communication quality.
Bringing real-time Voice Reconstruction AI onto the device
Live voice communication leaves little room for delay, unstable processing or interruptions. For Voice Reconstruction AI to feel natural in conversation, the system needs to process audio continuously and respond almost immediately.
Whispp reconstructs whispered or affected speech into a clear, natural voice without first converting it into text. By keeping the process audio-to-audio and running it locally, the technology is designed to preserve conversational timing, expression and elements of the speaker’s identity.
For the pilot, Whispp was optimized to run on the Snapdragon X Elite platform, using its dedicated Neural Processing Unit to support real-time Voice Reconstruction AI inference.
Why the NPU matters
Running Voice Reconstruction AI on a dedicated NPU can improve both performance stability and energy efficiency. This is especially relevant for technology that needs to operate continuously during calls rather than process a single prompt or isolated task.
Testing conducted during the pilot showed that Whispp maintained processing latency of approximately 48 to 50 milliseconds when running on the NPU. CPU-based execution showed greater variation, including latency spikes and disruptions during sustained processing.
The NPU also delivered substantially longer battery runtime in the test setup. Whispp ran for approximately 310 minutes on the NPU, compared with around 130 minutes during CPU-based processing under the same conditions.
“This collaboration with Qualcomm allowed us to test Whispp where the technology ultimately needs to perform: in real conversations, on the devices people already use. Running Voice Reconstruction AI efficiently on Snapdragon X Elite shows what becomes possible when this technology moves directly onto the device.”
Joris Castermans, Founder and CEO of Whispp
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