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In addition to the excellent answers from other comments, I would also say that there is a benefit to external audio devices as they are less prone to interfere
by mgamache 7y ago
In addition to the excellent answers from other comments, I would also say that there is a benefit to external audio devices as they are less prone to interference. On-board audio can be noisy due to improper shielding.
- HelloNurse 7y agoDelivering a SBC with audio and improper shielding isn't something good engineers would do; audio with proper shielding would increase costs and/or require a less crowded board, which isn't a good tradeoff for most uses; so the good option is no audio.
- zzzcpan 7y agoYou would still have connectors and wires with sensitive analog singals picking up noise. Integrating ADC and amplifier with the mic and never pushing analog signals over wires is the best that can be done.