Rolstone Technology is leading innovator and solution provider of Networked AV over IP products, founded by a group of knowledgeable experienced engineers in Audio Visual industry.


After dedicating on DSP development for years, and building long-term relationship with supply-chain, we're now providing a range of Audio products for Corporate, Education, Conference and Houses of worship and more, which includes DSP Matrix, Microphone, In-ceiling Wall mount Speaker, Control Pad.


Innovative, Quality First, Easy to Use and Affordable price are our core values, efficient internal stock management to ensure on-time delivery.

We're more than welcome to help you gain your identity for your products with the level of your commitment.


All products with strict procedures control from product design, engineering to production, reliability, environmental and aging test to ensure a high-level quality and low defective rate, CE/FCC/RoHS certificated.


Our core advantages are DSP algorithms, comparing with other companies who only have one or two in this industry, our DSP devices able to provide following algorithms for different applications. 


AEC,  Acoustic Echo Cancellation, designed to remove the echoes in audio or video conferencing, providing three nonlinear filtering options, to optimize the AEC's performance when a far end signal is played over a loudspeaker into a reverberant  acoustic space and is picked up by a microphone.


AFS, Feedback Suppression, designed to eliminate howling caused by uncontrolled frequency cycles between the microphone and speaker.

When it detects feedback behavior, it places a narrow notch filter reducing the gain of that frequency to suppress audio feedback. Dynamic and Manual mode optional, Octave optional.

ANS,  Noise Suppression, using spectral subtraction algorithm, which can distinguish human voice and non-human voice, remove the non-human voice effectively, suppression level 6/10/15/18 dB optional.

AGC,  Auto matic gain control, automatically adjust input gain of a channel from microphone or other source based on how loud or soft. If the input is loud, the gain is turned down, if the input is soft, the gain is turned up, to remain a steady output gain.

ANC,  Automatic Noise Control, the system automatically adjust output gain through the noise detection of microphone, to protect the clarity and recognition of sound.

Auto Mixer,  automatically turns down the non-active microphones while leveler rides the active microphone levels to the desired target threshold within the target range, the system goes where it's needed.