针对dspfpga硬件、linuxC和Matlab优化的实时变调时间.zip

# EE 443 Final Project # Pitch Shift - Delay Based Approach ## Contributers: - Jake Garrison - Jisoo Jung <!--## Hardware Interface:--> <!--- KEY0: Reset pitch factor to 1 (equivalent to shifting 0 semitone)--> <!--- KEY1: Decrease pitch factor by 0.1 if switch0 is disabled, by 1 semitone if switch0 is enabled--> <!--- KEY2: Increase pitch factor by 0.1 if switch0 is disabled, by 1 semitone if switch0 is enabled--> <!--- KEY3: UART send button. Send pitch factor and switch config.--> <!--- Switch0: Semitone toggle. High -> pitch shift by 1 semitone. Low -> pitch shift by 0.1--> <!--- Switch1: Melody toggle. Pitch shift by designated melody.--> <!--- Switch2: Delay pitch function--> <!--- Switch3: Delay echo function--> <!--- Switch4: Loop --> <!--- Switch5: Disable right channel dry sound--> <!--- Switch7: Toggle input--> <!--NOTE: Only one of switches 1 through 4 should be enabled. Others get disabled--> ## Hardware Control  ### Pitch Shift Control - **KEY0:** Pitch reset (p = 1, semitone = 0, no shift) - **SW0 OFF:** pitch factor (inharmonic multiplier) - KEY1: Pitch shift decrement 0.1 - KEY2: Pitch shift increment 0.1 - **SW0 ON:** semitone mode (half step mapping) - KEY1: Semitone decrement 1 - KEY2: Semitone increment 1 ### I/O Control - **SW5 ON:** Enable dry input routing to right output channel - **SW5 OFF:** Disable right output channel (Wet only) - **SW7 ON:** Microphone input - **SW7 OFF:** Line Input ### UART Control _Sends data to our GUI_ - **KEY3:** Send UART buffer (current pitch factor, switch config and audio buffer) ### Effects Control _SW1 – SW4: ON is enabled, OFF is disabled, only one can be enabled_ - **SW1 Melody Auto tune:** pitch changes according to user's melody and tempo - Keys control pitch shift - **SW2 Pitch Decay:** Input is echoed, pitch shifting each echo by a given rate - KEY0: decrease pitch change rate - KEY1: increase pitch change rate - **SW3 Echo:** Input is echoed with constant pitch and variable decay - KEY0: decrease decay rate - KEY1: increase decay rate - **SW4 Loop:** Loop input indefinitely - Keys control pitch shift ## Software Interface:  1. **Global settings:** Displays current note as well as global tempo and key * User an input tempo and key note frequency 1. **Waveform select:** Choose waveform to map to piano keys 2. **Sample Mode:** Maps sample (from UART) to piano keys using pitch shift algorithm * User can input sample start and end points 3. **Melody Controls:** Play, record or reset a melody 4. **Note length:** Sets duration of next note played 5. **UART Control:** Initialize and receive UART * User can set COM port * Receive, then press KEY3 on hardware to send switch config, current note and an audio sample * Audio sample is used when in Sample Mode 6. **Hardware Status:** Indicates current pitch setting and Effects switch configuration