sˈiːbɜːɡ stˈɑːɹɾᵻd daɪvˈɜːsᵻfˌaɪɪŋ ɪts pɹˈɑːdʌkt lˈaɪnz ɪn nˈaɪntiːnhˈʌndɹɪd fˈɪfti nˈaɪn wɪððɪ ˌɪntɹədˈʌkʃən ʌv bˈækɡɹaʊnd mjˈuːzɪk plˈeɪɚz sˈʌtʃ ɐz ðə sˈiːbɜːɡ wˈʌn θˈaʊzənd, wˌɪtʃ jˈuːzd spˈɛʃəl nˈaɪnˈɪntʃ, sˈɪkstiːn tˈuː θˈɜːdz ˌɑːɹpˌiːˈɛm ɹˈɛkɚdz.
Seeburg started diversifying its product lines in 1959 with the introduction of background music players such as the Seeburg 1000, which used special 9-inch, 16⅔ rpm records.