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Figure 1 from 60-channel dual tone multi-frequency signaling receiver based on Goertzel algorithm on single 100MIPS TMS320C54 DSP platform | Semantic Scholar
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Taidacent Audio Generator Dual Tone Multi-Frequency Decoding DTMF Decoder Encoder Keypad Board DTMF Module: Amazon.com: Industrial & Scientific
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GitHub - MeowLucian/DTMF_Detector: :telephone_receiver: Using Matlab to simulate Dual-Tone Multi-Frequency (DTMF) of telephone
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