Bass and treble controls; 5 band equalizer; Low-power operation; High-quality on-chip stereo DAC with no phase error between channels; Zero-cross detection for smooth volume change; Quiet power-on and power-off Separate voltages for analog, digital, I/O SPI flash boot for special applications Costs ~$31 Although the VS1063 offers many more features and is capable of decoding in more formats than the VS1011 for an insignificant increase in price, the IC offers many features that the group won’t need it to perform. The group would like to build our own 5 band equalizer, so there is no need for the one included with the VS1063. The group is not interested in decoding the device being able to decode the Ogg Vorbis or WMA formats. And the group does not need an IC capable of encoding. Because of these several reasons, the group will use the simpler, and cheaper, VS1011. It offers all the features that we would like at a lower cost. 3.6.4 High Fidelity Audio The group would like to design a device capable of delivering high quality audio output; high quality audio is typically referred to as fidelity.” High fidelity audio can be “high described by the following characteristics: Low noise All digital will have noise due to the quantization process; Thermal noise will always be produced in the circuitry for temperatures above 0 K The group would like to aim for a signal-to-noise ratio (SNR) of at least 90 dB Little distortion Phase distortion can be caused by filters (used for equalization) with a non-linear relationship between phase and frequency The audibility of phase distortion can depend on various conditions Bessel filters have a linear relationship between phase and frequency Harmonic distortion can be caused by the non-linear components High fidelity devices tend to have < 5% Total Harmonic Distortion Accurate frequency response Excluding any desired equalization effects Humans can hear at around a range of 20 20k Hz – 3.6.5 Volume Leveling The group would like to implement some sort of volume leveling module; due to the War,” newer music can be significantly louder than older music. The group “Loudness would like to prevent any harsh changes of volume between songs. There are a few ways
Bass and treble controls; 5 band equalizer; Low-power operation; High-quality on-chip stereo DAC with no phase error between channels; Zero-cross detection for smooth volume change; Quiet power-on and power-off Separate voltages for analog, digital, I/O SPI flash boot for special applications Costs ~$31 Although the VS1063 offers many more features and is capable of decoding in more formats than the VS1011 for an insignificant increase in price, the IC offers many features that the group won’t need it to perform. The group would like to build our own 5 band equalizer, so there is no need for the one included with the VS1063. The group is not interested in decoding the device being able to decode the Ogg Vorbis or WMA formats. And the group does not need an IC capable of encoding. Because of these several reasons, the group will use the simpler, and cheaper, VS1011. It offers all the features that we would like at a lower cost. 3.6.4 High Fidelity Audio The group would like to design a device capable of delivering high quality audio output; high quality audio is typically referred to as “high fidelity.” High fidelity audio can be described by the following characteristics: Low noise All digital will have noise due to the quantization process; Thermal noise will always be produced in the circuitry for temperatures above 0 K The group would like to aim for a signal-to-noise ratio (SNR) of at least 90 dB Little distortion Phase distortion can be caused by filters (used for equalization) with a non-linear relationship between phase and frequency The audibility of phase distortion can depend on various conditions Bessel filters have a linear relationship between phase and frequency Harmonic distortion can be caused by the non-linear components High fidelity devices tend to have < 5% Total Harmonic Distortion Accurate frequency response Excluding any desired equalization effects Humans can hear at around a range of 20 – 20k Hz 3.6.5 Volume Leveling The group would like to implement some sort of volume leveling module; due to the “Loudness War,” newer music can be significantly louder than older music. The group would like to prevent any harsh changes of volume between songs. There are a few ways
SD1%20-%20FinalDocumentv5%20-%20Group34.docx