Designed for Windows, Zelscope is a software application that converts a personal computer into a dual-trace oscilloscope and spectrum analyzer. Utilizing the sound card as an analog-to-digital converter, it enables real-time visualization of audio waveforms and spectral data, making it suitable for analyzing music, speech, and electronic circuits. The intuitive interface includes essential controls for gain, offset, timebase, and triggering, closely resembling traditional oscilloscope functionality.

The software supports both 8-bit and 16-bit data acquisition and offers a bandwidth ranging from 10 Hz to 20 kHz. Users can work in various modes, including single trace, dual trace, and XY (Lissajous) mode, along with features for precise measurements and cursor-based readings. With a responsive display that refreshes at up to 50 frames per second, Zelscope facilitates audio tuning, electronics adjustments, and software debugging. Data can be exported in formats such as WAV, BMP, and EMF, enhancing the software’s utility for diverse applications. In India, the pricing begins at $5, with multiple plans available to meet various user needs.