Undefined symbol compile time errors in AudioEffects project in Xcode

[Shinehah-Gnolaum]

I am getting compile errors for undefined symbols when I compile your AudioEffects Xcode project to run on an iPhone 8 Simulator.

Here are the error messages as I copied and pasted from the Build target window in Xcode:

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👎 Undefined symbol: _sox_init

👎 Undefined symbol: _sox_delete_effects_chain

👎 Undefined symbol: _sox_flow_effects

👎 Undefined symbol: _sox_create_effects_chain

👎 Undefined symbol: _sox_find_effect

👎 Undefined symbol: _sox_close

👎 Undefined symbol: _sox_open_write

👎 Undefined symbol: _sox_create_effect

👎 Undefined symbol: _sox_effect_options

👎 Undefined symbol: _sox_open_read

👎 Undefined symbol: _sox_add_effect

👎 Undefined symbol: _sox_quit