The voice engine of rpsexdoll supports extensive customization. Its TTS module can adjust dynamically 23 parameters such as fundamental frequency (80-280Hz) and forsypeak (±15%), with the natural voice similarity rate being 98%. After inputting the voice sample of 10 minutes by users through the mobile APP, the AI model (based on WaveNet architecture) is able to generate customized voiceprints within 45 minutes, with an MOS score of 4.2/5 (the industrial average being 3.7). Tests performed by the Japan Institute of Acoustics show that frequency deviation in the fundamental frequency of this technology for some timbres (such as the sound of a “kind girl”) is controlled at ±2Hz, and frequency deviation of resonant peak frequency is ≤5%.
Hardware setup-wise, rpsexdoll comes equipped with a dual-core DSP audio processor (with computation capability of 2.4TOPS), real-time support for sound field simulation (latency ≤15ms). Its A frequency response range of 80Hz-18kHz±3dB and 3D skull conduction technology have a stable sound pressure level of 60-70dB (A-weighted) and a distortion rate of less than 0.5%. The attenuation of sound quality in the TUV certification test in Germany was merely 0.8dB following 8 hours of continuous playback, exceeding the EN 50332-2 safety standard.
rpsexdoll’s Speech Recognition (ASR) system has outstanding multi-language flexibility, recognizing 78 language dialects, and with a recognition rate of 97.3% in a silent environment and 89.1% in a 65dB background noise. Users can also personalize the recognition of specific domain vocabulary by loading a personal word library (up to 5,000 words). For example, the recognition rate of proper nouns in the medical care scenario has increased from 82% to 96%. Its NLP component has context association (with a memory of up to 10 rounds of conversation) and the median response time is 0.8 seconds (industry average is 1.5 seconds).
The technological breakthrough in emotional expression technology enabled rpsexdoll’s emotional simulation algorithm to process the intensity of emotion in text (0-100%) and convert it into the fundamental frequency microwave movement (±8%), the speech rate (±30%), and the pause interval (50-800ms) of speech. Measurements by the MIT Media Lab indicate that in the “sad” emotional condition, speech jitter (fundamental frequency perturbation) increases to 1.2% (0.6% in neutral state), speech shimmer (amplitude perturbation) increases to 5.8% (3.5% in neutral), and the emotional resonance level of human subjects increases by 63%.
There is a balance in costs and efficiency in rpsexdoll’s voice customization service, with three levels available: the basic level ($199,10 preset voice lines), the advanced level ($499, voiceprint cloning), and the professional level ($1,299, real-time emotional interaction). Customer data shows that the repurchase rate for customers who choose the advanced level is 72%, with an average usage of 6.3 hours per day (3.1 hours for the basic level). Its cloud training cluster (NVIDIA A100-based) has brought down the model iteration time to 2 hours from 48 hours, and the cost of tailoring has decreased by 89% from 2019.
Privacy and compliance guarantee: rpsexdoll transmits voiceprint data with AES-256-GCM encryption and has already undergone GDPR and CCPA certification. The user voiceprint model is saved in the local security chip (EAL5+ certified), and the erasure rate of biometric information is 100%. During the FBI Red Team test, the accuracy rate of the system against voice deepfake attacks reached 99.4%, and the false recognition rate (FAR) was merely 0.003%.
The market validation has been highly successful. According to the 2023 RealDoll user survey, voice pack customization has strengthened the product’s ability to sustain premium pricing by 37%, and the customer satisfaction rate (NPS) has risen from 68 to 89. Its “Star Voice” collaborative projects (e.g., mimicking Scarlett Johansson’s voiceprint) have driven a 220% sales increase, with the largest number of daily download volume of voice packs up to 12,000 times. Statistics from the Japanese otaku subculture group show that users who like personalizing the voice of 2D characters have a mean frequency of daily usage of 23 times (9 times for the original voice group).
The technological boundary continues to be pushed. rpsexdoll research center has been developing a cross-language real-time translation feature (targeting a delay level of ≤0.5s), with simultaneous support for Chinese, English, and Japanese mixed dialogues. Its new bone conduction array (Patent No. US2023157821) supports the extension of speech audio bandwidth up to 50Hz-22kHz. It will come into mass production in Q4 2024, and speech naturalness MOS score is going to increase to 4.6.