Introduction: Wearable audio-biofeedback (ABF) is emerging to provide real-time feedback to heighten both biomechanical and physiological outcomes. A novel ABF prototype was developed to acquire the signals provided by a pressure-sensitive insole, measure the plantar pressure (PP), and offer biofeedback in real time. This study aimed to investigate the short-term effect of the ABF system on PP and linear acceleration. Methods: The ABF system based on Arduino micro (sample rate 34Hz) was made with 10 force-sensing resistors (FSR402), an MPU-6050 triaxial accelerometer (ACC), and a headset for posture control based on ABF. Also, TRIGNO™ Wireless System assessed postural control using 10 triaxial ACC sensors (27x37x15mm, with a sample rate of 148Hz) placed on the spinous process of C7 and L5, the deltoid tuberosity of the humerus, the midpoint between the anterior superior iliac spine and the upper border of the patella bone, 15 cm above the lateral malleolus, and the anterior midpoint of the head of the III, IV, and V phalangeal metatarsus. Results: Four participants (aged 29±3.92 years) performed standing trials with the ABF system both ON and OFF. A significant improvement in posture control was shown based on PP and linear acceleration with the ABF ON. Higher PP (p<0.001) was detected when the stimulus was ON, particularly in the middle and final right foot of the task. Notably, a significant modification of linear acceleration was observed in most sensors. Participants reported comfort in wearing the ABF device, highlighting its potential for practical use. The linear acceleration of the low-cost ABF system showed similar performance with that of the commercial system. Conclusion: Our findings underscore the potential practical use of the ABF device for enhancing postural proprioception in outpatient clinical and home-based rehabilitation.