Sync Volca Beat

good evening everyone,

I have a little problem , I can not sync my Korg volca beat with my analofg rytm . I try anything, send transportation is checked USB + Midi is on but it does not work anyone could he solve this problem ?

PS : i use a thru midi port.

Thank you in advance.

USB and DIN (Thru) are NOT connected
Thru only echoes that which appears at DIN In

Thank you , I find , by plugging the volca beat on my A4 it works . Thru port does not work on my Rytm because it is so master thru the port is not enabled . There is a solution to the harbor thru become a standard MIDI output port ?

No. The Thru port is only for directly copying the data arriving at the In DIN port - you can also change the Hardware port function into a Din Sync port but that’s not relevant here
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If Rytm is master clock then you need to find another thru port further down the midi chain or a thru box or use audio sync etc - or get a din sync to midi or audio sync gadget … or possibly make one with an arduino etc
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a simple mid thru box may be simplest just after the rytm if you can’t find another midi output containing the master clock