enjoyneering

try to change "m_i2s_std_cfg.clk_cfg.clk_src" from "I2S_CLK_SRC_DEFAULT" to "SOC_MOD_CLK_XTAL" or "SOC_MOD_CLK_PLL_F240M" By the way, SCLK (Serial clock) and MCLK (Master clock frequency) are not the same thing. This library uses 3-wire...

Have you tried increasing the connection timeout? https://github.com/schreibfaul1/ESP32-audioI2S/blob/master/src/Audio.h#L146C10-L146C76

I often use ESP-01 with [AHT10](https://github.com/enjoyneering/AHTxx/blob/main/examples/AHT10_Serial/AHT10_Serial.ino#L82) in my projects and they work OK if SDA is on GPIO0 and SCL is on GPIO2.