

Sound Plus Doctrine
Sovereign Grace Music
Sound Plus Doctrine, hosted by Bob Kauflin and David Zimmer, is the podcast of Sovereign Grace Music, designed for those who plan, lead, or participate in their church’s Sunday gatherings. Bob has been a pastor for over three decades and leads Sovereign Grace Music. He’s well-known as a worship leader, songwriter, speaker, and author. David, his good friend, is an experienced drummer, vocalist, teacher, and songwriter. Both are now part of Sovereign Grace Church in Louisville, KY, and they’d love for you to join them each week for an engaging, Christ-centered conversation about music and the church.
Episodes
Mentioned books

Sep 22, 2025 • 37min
What If I Struggle When I’m Not Leading?
Season 10 of Sound Plus Doctrine kicks off with a question from a listener who had to step down from leading congregational worship for a longer period than he expected. Bob, David, and Devon discuss how God often uses times when we don’t serve to help us better understand how we view our role and ways he might be working, of which we might be unaware.
Have a question about this episode? Send us an email at soundplusdoctrine@sovereigngrace.com

May 26, 2025 • 34min
When Music Ministry Becomes a Monster
Music can be a massive blessing and encouragement to a local congregation. But when musicians begin to think their contribution is more important than everything else, it leads to conflict. A podcast listener wrote in to ask how they might resolve that kind of tension between their music department and the rest of the church. Listen in as Bob and David suggest biblically practical ways to tame the monster of music ministry.
Have a question about this episode? Send us an email at soundplusdoctrine@sovereigngrace.com

May 19, 2025 • 37min
Why Don’t We Sing This Song?
If you lead the music in your church you’re bound to encounter the well-meaning member who enthusiastically suggests a song your church should be singing. What do you do when for various reasons that particular song may not be an ideal addition? That’s the topic David and Bob address in this episode of Sound Plus Doctrine.
Have a question about this episode? Send us an email at soundplusdoctrine@sovereigngrace.com

May 12, 2025 • 41min
An Interview with Sol Fenne from His Estate
Sol Fenne, along with his wife Carlie, leads His Estate, “a music ministry from UK council estates from where we write and produce word-centered songs for the narrow way.” In this episode of Sound Plus Doctrine, we had the joy of talking to Sol, who has a heart for bringing the hope of the gospel through song to those who live hard lives in hard places. We found this conversation immensely encouraging and trust that you will too.
Have a question about this episode? Send us an email at soundplusdoctrine@sovereigngrace.com

May 5, 2025 • 42min
Why Are You Downcast, O My Soul? – A Testimony
In the mid-90s, Bob Kauflin went through a 2 year period of depression, anxiety, confusion, and panic attacks, all accompanied by physical symptoms and a constant feeling of hopelessness, all while he was serving as a pastor in a church plant. In this episode, David interviews Bob about some of the things he learned from that time that have contributed to a deeper love for Christ and a greater trust in his promises.
Have a question about this episode? Send us an email at soundplusdoctrine@sovereigngrace.com

Apr 28, 2025 • 36min
What’s the Place of Special Music on Sunday Mornings?
Churches will often allot a portion of their Sunday service for “special music.” We’re talking about music that is performed, either by a soloist, a group, a choir, or some other makeup of musicians. At times it can be a massive blessing. But not always. In this episode, Bob and David explore how we might think of special music presentations through a Scriptural lens, and what factors contribute to its usefulness or ill effects.
Have a question about this episode? Send us an email at soundplusdoctrine@sovereigngrace.com

Apr 21, 2025 • 33min
Should Our Sunday Songs Sound Like the Recordings?
Churches often use recorded arrangements of songs as the template for what they do on Sunday rmoning. In this episode David and Bob talk about the advantages and drawbacks of that approach, looking at it through the lens of what best serves our congregations.
Have a question about this episode? Send us an email at soundplusdoctrine@sovereigngrace.com

Apr 14, 2025 • 40min
Himnos: A New Spanish Album!
In this episode, we sit down with Fabrizio Rodulfo to talk about Himnos, our latest Spanish album with Gracia Soberana Música. We reflect on the journey from our first Spanish projects to this new record, and discuss the heart behind translating timeless hymns for the church in Latin America. Fabrizio shares about the dynamic of our translation team, the challenges and joys of adapting songs across cultures, and why we believe faithful, singable, gospel-rich translations are so needed today. Whether you speak Spanish or not, this conversation will deepen your appreciation for the global church and the power of truth-filled songs in every language.
If you would like to donate to our Spanish resources, you can give here by selecting Gracia Soberana Musica in the dropdown menu of the designation field.
Have a question about this episode? Send us an email at soundplusdoctrine@sovereigngrace.com

Apr 7, 2025 • 39min
Is it Okay for Church Musicians to Play in Secular Bands?
There are various reasons why musicians who play and sing for their church on Sunday mornings might choose to use their musical gifts in contexts outside the church. Is it always wrong? It is always right? What kinds of questions can we ask about our hearts to help us make wise decisions? Bob, David, and Devon explore those questions and more on this episode of Sound Plus Doctrine.
Have a question about this episode? Send us an email at soundplusdoctrine@sovereigngrace.com

Mar 31, 2025 • 38min
Should We Sing More Simple Songs?
Some worship songs move us emotionally but contain little that actually feeds our minds, while others feel like systematic theology set to music. In this episode, Bob, David, and Devon respond to a question from a listener who wonders if we need more theologically driven songs that contain simpler lyrics. We had a great time exploring the topic and hope you enjoy listening!
Have a question about this episode? Send us an email at soundplusdoctrine@sovereigngrace.com


